3-2 3/15+7,45-1 11/25-4 13/75 =
3-2 1/5+7,45-11/25-52/75=
3-2 1/5+149/20-11/25-52/75 =
3-2/5+149/20-11/25-52/75= 107/12
1,4*(9 5/12х-15/164)=14/123
7/5*(3 5/4х-15/164)=14/123
7/5*(15/4х-15/164)=14/123
21/4х-21/164=14/123
2583х-63=56
2583х=63+56
2583х=119
х=119/2583