CPM Homework Help : GB8I Problem 9-59

Solve each equation. Be sure to determine and check all of the solutions.

Hint (all):

Read Math Note box from 9.2.2 (this section) on solving absolute value equations.

Step 1(a):

Within the |__| symbols, the
$9 + 3x$ can be $39$ or $9 + 3x$ can be $−39$ (looking inside). So set $9 + 3x = 39$ and $9 + 3x = −39$ .

Step 2(a):

Solve for $x$ in both equations.

Step 3(a):

Be sure to check both solutions in the original absolute value equation.

Answer (a):

$x = 10$ or $x = −16$

Hint (b):

Follow same steps as part (a).

Hint (c):

Follow same steps as part (a).