Answer
$x=0$
Work Step by Step
We are given that $5+7(x+1)=12+10x$.
In order to solve for x, we must first simplify the left side using the distributive property.
$5+7x+7=12+10x$
Group like terms on the left side.
$12+7x=12+10x$
Subtract 7x from both sides.
$12=12+3x$
Subtract 12 from both sides.
$0=3x$
Divide both sides by 3.
$x=0$