### Home > CC2MN > Chapter 7 > Lesson 7.2.2 > Problem7-65

7-65.

Substitute the given solution into the corresponding equation to check it. Then decide if the solution is correct or incorrect.

1. $5x+8=3x-2$

Substitute the value in for $x$ and solve to see if the two sides are equal to each other.

$\begin{array}{l} 5(-5)+8=3(-5)-2\\ \; \; \; -25+8=-15-2 \end{array}$

• Solution: $x=-5$

$-17=-17$
Solution $x=-5$ is correct.

1. $2(x+1)+6=20-3x$

See part (a).

• Solution: $x=4$