## Intermediate Algebra for College Students (7th Edition)

$-10$
Subtract $3x$ on both sides of the equation to obtain: $2x+20=0$ Subtract $20$ on both sides of the equation to obtain: $2x=-20$ Divide by 2 on both sides of the equation to obtain: $x = \frac{-20}{2} \\x=-10$ Check: $5(-10)+20 =3(-10) \\-50+20=-30 \\-30=-30$