1)y-2/3=7y/12 /.12
12y-8=7y
12y-7y=8, 5y=8,y=8/5, y=1,6
2)0,5x-7=-2x/3 /.6
3x-42=-4x
3x+4x=42, 7x=42, x=6
3)6y-2 4/5=2,5y
6y-14/5=5y/2 /.10
60y-28=25y, 60y-25y=28, 35y=28, y=28/35, y=4/5, y=0,8
4)2x-9=5(x-4)
2x-9=5x-20
2x-5x=-20+9, -3x=-11, x=11/3
5)8-2x=15(1-x)
8-2x=15-15x
-2x+15x=15-8, 13x=7, x=7/13