Question

me ajudemmmm. preciso pra hj...​

Answer 1

Resposta:

a) 6x = 30

x= 30/6

x= 5

b) 3x + 10 = 28

3x = 28-10 (18)

x = 18/3

x = 6

c) 4x - 15 = 45 + 2x

4x - 2x = 45+15

2x = 60

x= 60/2

x = 30

d) 7x - 40 = 2x

7x - 2x = 40

5x = 40

x = 40/5

x = 8

e) 4 (x-5) = 20 (faz a distribuitiva)

4x - 20 = 20

4x = 20 + 20

4x = 40

x = 40/4

x = 10

f) 3 · (2x + 4) = 2 · (20 + x)

6x + 12 = 40 + 2x

6x-2x = 40-12

4x = 28

x = 28/4

x = 7