Question

resolver a equação 2(x+1)=9

Answer 1

$2(x + 1) = 9 \\ 2x + 2 = 9 \\ 2x = 9 - 2 \\ x = \frac{7}{2}$

Answer 2

2(x+1)=9
2x + 2 = 9 
2x = 9 - 2
x = 7 / 2