Question

1 _Calcule as equações do 1° grau:

a)72 = 48 + x b)15 = x + 20 c)6x = 2x + 28

d)9 – x + 2= -5x +3 +2x e)6x – 10 = 2x + 14​

Answer 1

→ Cálculo :

A) 72 = 48 + x

-x = 48 - 72

-x = -24

x = 24

B) 15 = x + 20

-x = 20 - 15

-x = 5

x = -5

C) 6x = 2x + 28

6x - 2x = 28

4x = 28

x = 28 ÷ 4

x = 7

D) 9 - x + 2 = -5x + 3 + 2x

11 - x = -3x + 3

-x + 3x = 3 - 11

2x = -8

x = -8 ÷ 2

x = -4

E) 6x - 10 = 2x + 14​

6x - 2x = 14 + 10

4x = 24

x = 24 ÷ 4

x = 6