Решите уравнение ( 2/3 х - 1/5 ) * 15 = 85
2/3 x -1/5 = 85/15 2/3 x = 85/15 + 3/15 2/3 x = 88/15 10/15 x = 88/15 x=8.8
(15* 2/3)х - 15*1/5 = 85 (30/3)х - 15/5 = 85 10х - 3 = 85 10х = 85+3 10х = 88 х = 88/10 х = 8.8