3(2 1//2x-0,2)-15 1//15=6-(2//3-0,5x)7.5x-0.6-15 1//15-6+2//3-0.5x=0
7.5x-47//3-6+2//3-0.5x=0
7.5x-21-0.5x=0
7x-21=0
x=21/7
x=3
// - черта дроби
