Explanation
[tex]-8a+32=72[/tex]to find a , we need to isolate it
Step 1
subtract 32 in both sides
[tex]\begin{gathered} -8a+32=72 \\ -8a+32-32=72-32 \\ -8a=40 \end{gathered}[/tex]Step 2
divide both sides by -8
[tex]\begin{gathered} -8a=40 \\ \frac{-8a}{-8}=\frac{40}{-8} \\ a=-5 \end{gathered}[/tex]I hope this helps you
