Question

A) (8-×)-(5+×)=(7+2×) o cálculo pôr favor
12 15 15


B) -5(×+1)+10(×+2)=100



C) (×+1)+(×+3)=(7-×)
2. 3. 6


D)5×+12=22

Answer 1

Resposta:

A) 8 - x - 5 - x = 7 + 2x

3 -2x = 7 +2x

-4 = 4x

x = -1

B) -5x + 5 + 10x + 120 = 100

5x + 125 = 100

5x = - 25

x = -5

C) x + 1 + x + 3 = 7 - x

2x + 4 = 7 - x

3x = 3

x = 1

D)5x + 12 = 22

5x = 10

x = 2