1.
(x-5)/6=8/3
3x-15=48
3x=63
x=63:3=21
2.
(2x+3y)/(6x-y)=7/5
10x+15y=42x-7y
32x-22y=0 :y
32x/y -22=0
x/y=22/32=11/16
