Question

A)7 (×-2)=5 (x+3)
B)2 (x-5)+4 (x-1)=0
C)3 (2×-1)=-2 (x+3)
D)7 (x-1)-2 (x-5)=x-5

Answer 1

a)_ 7(x - 2) = 5(x + 3)
7x - 14 = 5x + 15
7x - 5x = 15 + 14
2x = 29
x = 29 ÷ 2
x = 14,5

b)_ 2(x - 5) + 4(x - 1) = 0
2x - 10 + 4x - 4 = 0
6x - 14 = 0
6x = 14
x = 14 ÷ 6
x = 2,33

c)_ 3(2x - 1) = - 2(x + 3)
6x - 3 = - 2x - 6
6x + 2x = - 6 + 3
8x = - 3
x = (- 3) ÷ 8
x = - 0,375

d)_ 7(x - 1) - 2(x - 5) = x - 5
7x - 7 - 2x + 10 = x - 5
7x - 2x - x = - 5 + 7 - 10
4x = - 8
x = (- 8) ÷ 4
x = - 2

Espero ter ajudado!