Question

Resolva as equação
A:4×-1=3 (×-1

B:3 (×-2)=2×-4

C:2 (×-1)=3×+34

D:3 (×-1)-7=15

E:7 (×-4)=2×-3

Answer 1

Olá!

a)

$4x - 1 = 3 \times (x - 1) \\ 4x - 1 = 3x - 3 \\ 4x - 3x = 1 - 3 \\ x = - 2$

b)

$3 \times ( - 2) = x - 4 \\ - 6 = x - 4 \\ - 6 + 4 = x \\ x = - 2$

c)

$2 \times (x - 1) = 3x + 34 \\ 2x - 2 = 3x + 34 \\ 2x - 3x = 34 + 2 \\ - x = 36 \: \: \: \: \times ( - 1) \\ x = - 36$

d)

$3 \times ( x - 1 ) - 7 = 15 \\ 3x - 3 - 7 = 15 \\ 3x = 15 + 3 + 7 \\ 3x = 25 \\ x = \frac{25}{3}$

e)

$7 \times (x - 4) = 2x - 3 \\ 7x - 28 = 2x - 3 \\ 7x - 2x = 28 - 3 \\ 5x = 25 \\ x = 25 \div 5 \\ x = 5$