24 m-16-13=60+15m+28
24m-29=88+15m
24m-15m=88+29
9m=117
m=13
24m-16-13=60+15m+28
24m-15m=60+28+16+13
m=117:9
24 m-16-13=60+15m+28
24m-29=88+15m
24m-15m=88+29
9m=117
m=13
24m-16-13=60+15m+28
24m-15m=60+28+16+13
9m=117
m=117:9
m=13