-2(5m - 9) + 2 = 15 + 7(- m + 2)
- 10m + 18 + 2 = 15 - 7m + 14
- 10m + 7m = 29 - 20
- 3m = 9
m = - 3
-2(5m-9)+2=15+7(-m+2)
-10m+18+2=15-7m+14
18+2-15-14=-7m+10m
20-29=3m
-9=3m
m=-3
-2(5m - 9) + 2 = 15 + 7(- m + 2)
- 10m + 18 + 2 = 15 - 7m + 14
- 10m + 7m = 29 - 20
- 3m = 9
m = - 3
-2(5m-9)+2=15+7(-m+2)
-10m+18+2=15-7m+14
18+2-15-14=-7m+10m
20-29=3m
-9=3m
m=-3