Question

qual é a resposta 5x+4=34
2x+5=×-30
8x-10=70​

Answer 1

Resposta:

5x + 4 = 34

5x = 34 - 4

5x = 30

x = 30/5

x = 6

2x + 5 = x - 30

2x - x = - 30 - 5

x = - 35

8x - 10 = 70

8x = 70 + 10

8x = 80

x = 80/8

x = 10