Answer
m = 13
Work Step by Step
9 = m - 4
The goal remains to separate our variable and get it alone on one side of the equal sign.
To do this, we must add 4 to both sides of our equation.
9+4=m-4+4
On the left side, we add 9+4 and get 13. On the right side, -4 and 4 cancel leaving m.
Our final answer is:
m=13
