8*(3m - 2) - 13=5*(12+3m) + 28
8*(3m-2)-13=5*(12+3m)+28 24m-16-13=60+15m+28 24m-29=88+15m 24m-15m=88+29 9m=117 m=117:9 m=13
24m-16-13=60+15m+28 24m-15m=60+28+16+13 9m=117 M=117:9 M=13