## College Algebra (10th Edition)

$b=2$
Substitute $2$ to $x$ in the given equation to obtain: $2+2b=2-4+2b(2) \\2+2b=-2+4b$ Subtract $2b$ and add $2$ to both sides of the equation to obtain: $2+2b-2b+2=-2+4b-2b+2 \\4=2b$ Divide $2$ on both sides to obtain: $2=b$