### Home > CCAA8 > Chapter 1 Unit 1 > Lesson CCA: 1.2.1 > Problem1-40

1-40.

Solve the equations below for $x$ and check your solutions.

• Look at problem 1-36 earlier in this lesson for steps in solving these kinds of problems.

1. $−6+10x=x+12$

• $x=2$

Substitute the answer back into the original equation to make sure it works.

$−6+10(2)=(2)+12$
$−6+20=2+12$
$14=14$

It works!

1. $10+5x=2x−11$

1. $−9x=−3x+18$

1. $2x−9=−7x$

• $x=1$
Refer to part (a).