Question

responda a equação: 3x + 2(x + 1) = 7​

Answer 1

$3x + 2x + 2 = 7 \\ 5x = 7 - 2 \\ 5x = 5 \\ x = 5 \div 5 \\ x = 1$

Prova real:

$3 \times 1 + 2 \times 1 + 2 \times 1 = 7 \\ 3 + 2 + 2 = 7 \\ 7 = 7$