1) 7 1/5 * (15 - x) = 1 11/25
15-x = 1 11/25 : 7 1/5 = 36/25 * 5/36
15-x = 1/5
x = 15 - 1/5
x = 14 4/5
2) (10 - x) : 12/35 = 35/12
10-x = 35/12 * 12/35
10-x = 1
x = 10 - 1
x = 9
