Question

ATIVIDADE 5. Resolva as equações a seguir:

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

b) 2(x - 5) + 4(x - 1) = 0

c) 3(2x - 1) = - 2x + 3)

d) 7(x - 1) - 2(x - 5) = x - 5

me ajuda​

Answer 1

Resposta:

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

7x-14=5x+15

2x=29

x=29/2

x=14,5

b) 2(x - 5) + 4(x - 1) = 0

2×-10+4×-4=0

6×-14=0

6×=14

×=14/6

×=7/3

c) 3(2x - 1) = - (2x + 3)

6×-3=-2×-3

4×=0

×=0

d) 7(x - 1) - 2(x - 5) = x - 5

7×-7-2×+10=×-5

4×=-5-3

4×=-8

×=-8/4

×=-2