Question

aaaaaaa urgenteee pfvv

Answer 1

Resposta:

por hora vou responder a 7 blz?

7°) a) 2x + 8 = 16

2x = 16 - 8

2x = 8

x = 8÷2

x = 4

b) 20 - 3(x + 5) = 5

20 - 3x - 15 = 5

-3x + 5 = 5

-3x = 5 - 5

x = 0

c) 3x + 4 - 1(2x - 10) = 6

3x + 4 - 2x + 10 = 6

x + 14 = 6

x = 6 - 14

x = -8

d) 2x - 3(4 - x) = 12

2x - 12 + 3x = 12

5x - 12 = 12

5x = 12 + 12

5x = 24

x = 24÷5

x = 4.8

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

4x + 8 + 12 + 3x = 2 - x

4x + 3x + x = 2 - 8 - 12

8x = -18

x = - 18÷8

x = -2,25