Home > CC2MN > Chapter 7 > Lesson 7.2.6 > Problem7-123

7-123.

Show the “check” for each of these problems and write whether the solution is correct or incorrect.

1. For $3x+2=x-2$, does $x=0$?

Substitute $0$ for $x$.

$3(0)+2=0-2$ Now simplify.

$\array{ 0+2=0-2\\ \quad 2=-2}$
Is this statement true?

2. For $3(x-2)=30+x-2-x+2$, does $x=12$?

Follow the steps in part (a).