Question

Necesito ayuda con mi tarea.
Dice:
Hallar el valor de X.

A_7x - 8 + 2x =4x + 17

B_21 + 10x - 19 = 7x + 30 - 4x

C_5 (x + 2) + 2x = 4x + 31

D_3 (x + 7) + 2 (x + 3) = x + 39

E_4 (3x + 1) - x = 3x + 20

F_2 (3 + 6x) - 5 = 7 (x + 8)

Answer 1

A)7x - 8 + 2x =4x + 17
7x+2x-4x=17+8
5x=25
x=25/5
x=5
...................................................................

B)21 + 10x - 19 = 7x + 30 - 4x
10x-7x+4x=30+19-21
7x=28
x=28/7
x=4
........................................................................
C)5 (x + 2) + 2x = 4x + 31
5x+10+2x=4x+31
5x+2x-4x=31-10
3x=21
x=21/3
x=7
..............................................................
D)3 (x + 7) + 2 (x + 3) = x + 39
3x+21+2x+6=x+39
3x+2x-x=39-21-6
4x=12
x=12/4
x=3
.............................................................................
E)4 (3x + 1) - x = 3x + 20
12x+4-x=3x+20
12x-x-3x=20-4
8x=16
x=16/8
x=2
...............................................................................
F)2 (3 + 6x) - 5 = 7 (x + 8)
6+12x-5=7x+56
12x-7x=56+5-6
5x=55
x=55/5
x=11