12h-7=7h+18
-7h -7h
5h-7=18
+7 +7
5h=25
5h/5= 25/5
h=5
1. Subtract the 7h from both sides to cancel out the 7h (7h-7 and 12h-7)
equation becomes 5h-7=18
2. Add the 7 on the left side of the equation to both sides to cancel out the -7 (-7+7 and 18+7)
equation becomes 5h=25
3. Divide by 5 to cancel out the 5h (5h/5 and 25/5)
equation becomes h=5 solving for h and giving you your final answer