Question

Solve. One point for showing the steps to solve each equation and one point for the correct solution.
3m - 5 = 7m - 21

Answer 1

3m-7m=-21+5
-4m=-16
4m=16
m=4

Answer 2

take 7m to the left side and -5 to the right side( remember the sign convention)

3m-7m = -21+5
-4m = -16
m = 4

Answer 3

7m-21=3m-5
7m-3m=-5+21
4m=16
m= 16/4
=4