Question

2/7 x +1 , para x= 14

Answer 1

$\frac{2}{7}x=-1$
$x=\frac{-11}{ \frac{2}{7} }$
x= $-1*\frac{7}{2}$
x=-$\frac{7}{2}$

Mas se X for 14 entao ficaria:
$\frac{2}{7}*14+1=4+1=5$