cual es el resultado a :
a 5+x/30=4x-7
b 2+6x=8-4x/6
c x+2/3-1=2x-1/4
d 4x-1/6+2=3x-1/8
e 3x-2/4+5=x+3/2
f 2(x+1)/3+4(x-2)=x/2+5
g 3(x-2)/6+2(x+1)/8+3-x/10=5
h x/6+2x/8+3x/10=2(x-1)
i 3(x-5)=2x/4+3(1-2x)/6
Respuestas
Respuesta dada por:
2
a) 5+x/30=4x-7
x
(30)(5)+30------= (30)(4x)- 30x (7)
30
150+x= 120x-210
x-120x= - 210-150
-119x= - 360
360
x= ------------//
119
b) 2+6x=8-4x/6
2x
2+6x= 8- -------
3
2x
(3)(2)+3(6x)= (3)(8)- 3 --------
3
6+18x=24 - 2x
18x+2x=24-6
20x = 18
18
x= ---------//
10
c) x+2/3-1=2x-1/4
2 - 3 1
x + ---------= 2x - ------
3 4
1 1
x- -----= 2x - -------
3 4
1 1
x - 2x= - ---------+------
4 3
-3+4
- x= ------------
12
1
- x= --------
12
1
x= - --------///
12
d) 4x-1/6+2=3x-1/8
4x+ -1+12/6 = 3x- 1/8
4x + 11/6= 3x - 1/8
4x - 3x= - 1/8 - 11/6
3+44
x= - ---------
24
47
x= - ---------//
24
e) 3x-2/4+5=x+3/2
3x- 1/2 + 5= x+ 3/2
- 1 +10 3
3x+ ------------= x+ --------
2 2
9 3
3x + -----= x+ -------
2 2
3 - 9
2x= -----------
2
6
2x= - --------
2
2x= -3
3
x= - --------//
2
f) 2(x+1)/3+4(x-2)=x/2+5
2(x+1) x
----------- +4x-8= -------- + 5
3 2
2x+2 x
----------- +4x-8= -------- + 5
3 2
2x+2 x
(6)---------- + 6(4)-6(8)= (6)--------+6(5)
3 2
2(2x+2)+24x-48=3x+30
4x+4+24x-48= 3x+30
28x-44= 3x+30
28x-3x= 30+44
25x= 74
74
x= ---------//
25
g) 3(x-2)/6+2(x+1)/8+3-x/10=5
3(x-2) 2(x+1) x
--------------- + --------------- - ----------= 5
6+2x+2 11 10
3x-6 2x+2 x
--------------- + --------------- - ----------= 5
6+2x+2 11 10
3x-6 2x+2 x
--------------- + --------------- - ----------= 5
8+ 2x 11 10
3x-6 2x+2 x
--------------- + --------------- - ----------= 5
2(4+x) 11 10
3x-6 2x+2 x
--------------- + --------------- - ---------- - 5 = 0
2(4+x) 11 10
55(3x-6)+10(4+x)(2x+2)-11x(4+x)-550(4+x)
-----------------------------------------------------------
110(4+x)
165x-330+(40+10x)(2x+2) -44 -11x al cuadrado -2200 - 550x
--------------------------------------------------------------------------------
110(4+x)
165x-330+(40+10x)(2x+2) -44 -11x al cuadrado -2200 - 550x
--------------------------------------------------------------------------------
110(4+x)
165x-330+80x+80 +20x)² +20x-44x-11x)² -2200 - 550x
--------------------------------------------------------------------------------
110(4+x)
-329x - 2450 +9x)²
-------------------------------------
110 (4 + x)
-329x-2450+9x)²=0
9x al cuadrado - 329x- 2450=0
- (-329) +- √(-329)² -4(9) (-2450)
x= --------------------------------------------
(2)(9)
329) +- √329² +88200
x= ------------------------------------
18
329 +√329² +88200
x= ------------------------------------
18
329) - √329² +88200
x= ------------------------------------
18
329 - √329² +88200 329+√329²+88200
x1= ------------------------------------; x2= -----------------------------
18 18
x1) 26.1426 x2) 42.9009
h) x/6+2x/8+3x/10=2(x-1)
x x 3x
------ + ------- - --------= 2x-2
6 4 10
x x 3x
60------ + 60----- - 60-------= (60)(2x)-60(2)
6 4 10
10x+15x-6(3x)=120x-120
10x+15x-18x=120x-120
7x= 120x-120
7x-120x = - 120
-113x= - 120
120
x= --------//
113
i) 3(x-5)=2x/4+3(1-2x)/6
x 1 - 2x
3x- 15= ------- + ------------
2 2
x 1 - 2x
(2)(3x) - 2(15)= 2------+2------------
2 2
6x-30= x+1-2x
6x-30= -x+1
6x +x= 1+30
7x=31
31
x= --------//
7
x
(30)(5)+30------= (30)(4x)- 30x (7)
30
150+x= 120x-210
x-120x= - 210-150
-119x= - 360
360
x= ------------//
119
b) 2+6x=8-4x/6
2x
2+6x= 8- -------
3
2x
(3)(2)+3(6x)= (3)(8)- 3 --------
3
6+18x=24 - 2x
18x+2x=24-6
20x = 18
18
x= ---------//
10
c) x+2/3-1=2x-1/4
2 - 3 1
x + ---------= 2x - ------
3 4
1 1
x- -----= 2x - -------
3 4
1 1
x - 2x= - ---------+------
4 3
-3+4
- x= ------------
12
1
- x= --------
12
1
x= - --------///
12
d) 4x-1/6+2=3x-1/8
4x+ -1+12/6 = 3x- 1/8
4x + 11/6= 3x - 1/8
4x - 3x= - 1/8 - 11/6
3+44
x= - ---------
24
47
x= - ---------//
24
e) 3x-2/4+5=x+3/2
3x- 1/2 + 5= x+ 3/2
- 1 +10 3
3x+ ------------= x+ --------
2 2
9 3
3x + -----= x+ -------
2 2
3 - 9
2x= -----------
2
6
2x= - --------
2
2x= -3
3
x= - --------//
2
f) 2(x+1)/3+4(x-2)=x/2+5
2(x+1) x
----------- +4x-8= -------- + 5
3 2
2x+2 x
----------- +4x-8= -------- + 5
3 2
2x+2 x
(6)---------- + 6(4)-6(8)= (6)--------+6(5)
3 2
2(2x+2)+24x-48=3x+30
4x+4+24x-48= 3x+30
28x-44= 3x+30
28x-3x= 30+44
25x= 74
74
x= ---------//
25
g) 3(x-2)/6+2(x+1)/8+3-x/10=5
3(x-2) 2(x+1) x
--------------- + --------------- - ----------= 5
6+2x+2 11 10
3x-6 2x+2 x
--------------- + --------------- - ----------= 5
6+2x+2 11 10
3x-6 2x+2 x
--------------- + --------------- - ----------= 5
8+ 2x 11 10
3x-6 2x+2 x
--------------- + --------------- - ----------= 5
2(4+x) 11 10
3x-6 2x+2 x
--------------- + --------------- - ---------- - 5 = 0
2(4+x) 11 10
55(3x-6)+10(4+x)(2x+2)-11x(4+x)-550(4+x)
-----------------------------------------------------------
110(4+x)
165x-330+(40+10x)(2x+2) -44 -11x al cuadrado -2200 - 550x
--------------------------------------------------------------------------------
110(4+x)
165x-330+(40+10x)(2x+2) -44 -11x al cuadrado -2200 - 550x
--------------------------------------------------------------------------------
110(4+x)
165x-330+80x+80 +20x)² +20x-44x-11x)² -2200 - 550x
--------------------------------------------------------------------------------
110(4+x)
-329x - 2450 +9x)²
-------------------------------------
110 (4 + x)
-329x-2450+9x)²=0
9x al cuadrado - 329x- 2450=0
- (-329) +- √(-329)² -4(9) (-2450)
x= --------------------------------------------
(2)(9)
329) +- √329² +88200
x= ------------------------------------
18
329 +√329² +88200
x= ------------------------------------
18
329) - √329² +88200
x= ------------------------------------
18
329 - √329² +88200 329+√329²+88200
x1= ------------------------------------; x2= -----------------------------
18 18
x1) 26.1426 x2) 42.9009
h) x/6+2x/8+3x/10=2(x-1)
x x 3x
------ + ------- - --------= 2x-2
6 4 10
x x 3x
60------ + 60----- - 60-------= (60)(2x)-60(2)
6 4 10
10x+15x-6(3x)=120x-120
10x+15x-18x=120x-120
7x= 120x-120
7x-120x = - 120
-113x= - 120
120
x= --------//
113
i) 3(x-5)=2x/4+3(1-2x)/6
x 1 - 2x
3x- 15= ------- + ------------
2 2
x 1 - 2x
(2)(3x) - 2(15)= 2------+2------------
2 2
6x-30= x+1-2x
6x-30= -x+1
6x +x= 1+30
7x=31
31
x= --------//
7
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