решите пожалуйста 1/4*1/3m=4 1/4-3m

1/4*1/3m=4 1/4-3m
1/4*1/3m = 17/4 -3m
1/12m - 3m = 17/4
1- 36/12m = 17/4
-35/12m = 17/4
m = 17/4 : (-35/12)
m = 17/4*(-12/35)
m = - 51/35 = -1 16/35