### Home > AC > Chapter 7 > Lesson 7.1.3 > Problem7-28

7-28.

For each equation below, solve for $x$ and check your answer.

For more help solving equations, see problem 6-107.

1. $10\left(2x-1\right)=100$

$5.5$

1. $\frac{1}{3}x-6=8$

$42$

1. $(x−2)(x+1)=x^2+4x$

1. $9x-21+9=2(5-x)$