Question

Tema:Ecuaciones de Primer Grado con una incógnita

Answer 1

Respuesta:

Ejercicio 1.

3x + 101 +4x-33-51x=-53x+31x-172

(3x + 4x - 51x) + (101 - 33) = (-53x + 31x) - 172

-44x + 68 = -22x - 172

-22x = -240

x = -240/-22

x = 120/11

Ejercicio 2.

3x - 14 - 12x +18x = 256 + 60x - 657x

(3x -12x + 18x) - 14 = 256 + (60x - 657x)

9x - 14 = 256 - 597x

606x = 270

x = 45 / 101

Ejercicio 3.

(-8x+15x+30x-51x)=53x-31x-100

-14x = 22x - 100

100=36x

x = 100/36

x = 25/9

Ejercicio 4.

9x - (5x + 3) - {2 + 8x - (7x-5)} - 9x =0

9x - 5x - 3 - {2 + 8x -7x +5)} - 9x = 0

4x - 3 - { 7 + x } - 9x = 0

4x - 3 -7 - x - 9x = 0

-6x = 10

x = 10/ -6

x= - 5/3

Ejercicio 5.

71 + [-5x + (2x +3)] = -25  -[-(3x + 4)-(4x+3)]

71 + [-5x + 2x +3] = -25 -[-3x -4 - 4x - 3]

71 + -3x +3 = -25 +7x + 7

74 - 3x = -18 + 7x

92 = 10x

x = 92/10

x=46/5

Ejercicio 6.

x + 3(x-1) = 6 + 4 (3x + 2)

x + 3x - 3 = 6 + 12x + 8

4x - 3 = 14 +12x

-17 = 8x

x = -17/8

Ejercicio 7

7(x +1) + 16(2x -3) = 3(5x - 7) -x

7x + 7 + 32x - 48 = 15x - 21 - x

39x - 41 = 14x - 21

25x = 20

x = 20/25

x = 4/5

Ejercicio 8

$3(2x+2)-4(3x-5)=x(x-3)-x(x+5)\\6x+6-12x+20=x^2-3x-x^2-5x\\-6x+26=-8x\\26=-2x\\x=-26/2\\x=-13$

Ejercicio 9

187 -4(5x-3) = 30 +6(x-1)-6

187 - 20x + 12 = 30 + 6x - 6 - 6

199 - 20x = 18 + 6x

181 = 26x

x = 181/26

Ejercicio 10

7(18-x)-3(6x-5)=-(9x+7)-2(3x+5)-12

126 - 7x - 18x + 15 = -9x - 7 - 6x  - 10 - 12

141 - 25x = -15x - 29

170 = 10x

x = 170/10

x = 17