-9 -16m=7 Original Question
+9 +9 Add 9 to both sides to isolate term -16m
-16m=16
————-
-16 Divide -16 to both sides of equation.
m= (16/-16)
m= -1 m equals -1
* Check: now when you substitute -1 into m in the original question, -9 -16(-1) =7, it should equal to 7.
