Question

d) 2x + 4-8=- 4x - 10
e) 3 (x - 2) = 2x - 4
f) 2 (x - 1) = 3x + 4
g) 5(2x - 4) = 7(x + 1) - 3
h) 3(3x-9) = 4(x + 5) + 3​

Answer 1

Resposta:

d) 2x + 4-8=- 4x - 10

2x+4x=-10-4+8

6x=-6

x= -1

e) 3 (x - 2) = 2x - 4

3x-6=2x-4

3x-2x=-4+6

x=2

f) 2 (x - 1) = 3x + 4

2x-2=3x+4

2x-3x=4+2

-x=6  (*-1)

x=-6

g) 5(2x - 4) = 7(x + 1) - 3

10x-20=7x+7-3

10x-7x=7-23

3x=-20

x= -20/3

h) 3(3x-9) = 4(x + 5) + 3​

9x-18=4x+20x+3

9x-4x-20x=3+18

9x-24x=21

-15x=21 (*-1)

15x= -21

x= -21/15

Explicação passo-a-passo: