Question

8. Resolva a equação abaixo: *

10 pontos



8

10

11

23

7

​

Answer 1

Explicação passo-a-passo:

10(X+1)-5(X+2)=70

10X+10-5X+10=70

10X-5X=70

5X=70

X=70/5

X=14

Answer 2

$\boxed{\begin{array}{l}\sf10\cdot(x+1)-5\cdot(x+2)=70\\\sf10x+\diagdown\! \!\!\!\!\!10-5x-\diagdown\!\!\!\!\!\!10=70\\\sf10x-5x=70\\\sf 5x=70\\\sf x=\dfrac{70}{5}\\\sf x=14\\\sf o~gabarito~est\acute a~errado. \end{array}}$