The expression:
[tex]|15-3x|=18[/tex]
To get the value of x
Step 1: solve the expression
[tex]\begin{gathered} 15-3x=18 \\ -3x=18-15 \\ -3x=3 \\ x=-1 \end{gathered}[/tex]
Step 2: solve the expression introducing the negative sign
[tex]\begin{gathered} 15-3x=-18 \\ -3x=-18-15 \\ -3x=-33 \\ x=-\frac{33}{-3}=11 \\ x=11 \end{gathered}[/tex]
The answer is:
x=-1 or x =11
