1)(15х - 22):19 = 2 (15х - 22) = 38,
15х = 38 + 22,
15х = 60,
х = 60 : 15
х = 4
2)85+48:(11-Х) = 91
48:(11 - х) = 91-85,
48:(11 - х) = 6,
(11-х) = 48 : 6,
11-х = 8 ,
-х = 8 - 11,
-х = - 3,
х = 3
3)86-49:(2x - 5x)=79,
49:(2Х-5Х) = 86 -79,
49:(2x - 5x)=7,
2x - 5x = 49 : 7
3 x = 7
x = 7/3