Question

b) 3(x+2)=15

c) 5(x+2)=30

d) 2(x-1)-7-16

e) 7(x-2=5(x+3)

f) 2(3x-5-x=10-3x

Answer 1

Bom dia

b) 3(x + 2) = 15
    3x + 6 = 15
    3x = 15 - 6
    3x = 9
     x = 9/3
     x = 3

c) 5(x + 2) = 30
    5x + 10 = 30
    5x = 30 - 10
    5x = 20
     x = 20/5
     x = 4

d) 2(x - 1) -7 = -16
    2x -2 -7 = -16
    2x -2 = -16 + 7
    2x -2 = -9
    2x = -9 + 2
    2x = -7
     x = -7/2

e) 7(x - 2) = 5(x + 3)
    7x -14 = 5x + 15
    7x - 5x = 15 + 14
    2x = 29
     x = 29/2

f) 2(3x - 5 - x) = 10 - 3x
   6x -10 -2x = 10 -3x
   6x -2x + 3x = 10 + 10
   7x = 20
    x = 20/7

Bons estudos