Question

2) Resolva as equações do 1° grau a) x + 2 = 10 b) 5a = 20 c) 3b - 6=0 d) 7x + 11 = 2x + 13​

Answer 1

Resposta:

a) x + 2 = 10

x = 10-2

x= 8

b) 5a = 20

a = 20/5

a= 4

c) 3b - 6 = 0

3b = 6

b=6/3

b= 2

d) 7x +11 = 2x +13

7x - 2x = 13 - 11

5x = 2

x= 2/5