Question

10 (x +1) -5 (x -2) = 70
????​

Answer 1

Explicação passo-a-passo:

$10.(x + 1) -5 (x - 2) = 70 \\ 10x + 10 - 5x + 10 = 70 \\ 5x = 70 - 10 - 10 \\ 5x = 50 \\ x = \frac{50}{5} = 10$

Answer 2

$\large \boxed{ \begin{array}{l} \rm \: 10(x + 1) - 5(x - 2) = 70 \\ \\ \rm \: 10x +10 - 5x + 10 = 70 \\ \\ \rm \: 5x + 20 = 70 \\ \\ \rm \: 5x = 70 - 20 \\ \\ \rm \: 5x = 50 \\ \\ \rm \: x = \dfrac{50}{5} \\ \\ \boxed{ \rm{x = 10}} \end{array}}$