x-1/4X=5/12
3/4x=5/12
x=5/12÷3/4
x=5/9
X-3/8X=3/5
5/8X=3/5
X=3/5÷5/8
X=24/25
6X+3/2X=15
15/2X=15
X=15÷15/2
X=2