Preciso de como resolvo esse sistema ?

2x-4y/5=2-x/3      < mmc = 15 
y-5x=-3y/5-6

30x-12y=30-5x
5y-25x=-3y-30

30x+5x-12y=30
5y+3y-25x=-30

35x-12y=30    35x=30+12y       X=30+12y/35
8y-25x=-30

8y-25(30+12y/35)=-30
8y-750-300y/35=-30
280y-750-300y=-1050
280y-300y=-1050+750
-20y=-300 (-1)
20y=300
Y=300/20
Y=15 

X=30+12y/35
X=30+12.15/35
X=30+180/35
X=210/35
X=6 

Logo  S=[x=6 Y=15] ​