Question

1) Resolva as equações:
a) 4(x + 1) = 12
b) 5(3 - x) - 4x = 18
c) 9x - 3(2x + 2) = 15
d)-3(x - 5) - 2(2x + 1) = -8
e) -X- 2x - 4 = 11​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 4(x + 1) = 12

4x+4=12

4x=12-4

4x=8

x=8/4

x=2

b) 5(3 - x) - 4x = 18

15-5x-4x=18

-5x-4x=18-15

-9x=3 .(-1)

9x=-3

x=-3/9

c) 9x - 3(2x + 2) = 15

9x-6x-6=15

3x=15+6

3x=21

x=21/3

x=7

d)-3(x - 5) - 2(2x + 1) = -8

-3x+15-4x-2=-8

-3x-4x=-8-15+2

-7x=-23+2

-7x=-21 .(-1)

7x=21

x=21/7

x=3

e) -X- 2x - 4 = 11

-3x=11+4

-3x=15 .(-1)

x=-15/3

x=-5