1/2x-6=3/4x   , 1/2X4x-6X4=3/4X4x, 2x-24=3x, x=24

1/2b-2/3b+b=2/3X6-1=3, 3b+2b=18, b=18/5 ,

16y-2.5y-7.5y=5, 16y-10y=5, 6y=5, y=5/6

3x+5=4x+1, 5-1=4x-3x, x=4

 9-3y=5y+5, 9-5=5y+3y, 8y=4, y=1/2