Question 690120
2y+X=9
X=3Y-3
2Y+(3Y-3)=9
5Y-3=9
5Y=9+3
5Y=12 
Y=12/5 ANS.
X=3*12/5-3
X=36/5-3
X=36/5-15/5
X=21/5 ANS.
PROOF:
2(12/5)+21/5=9
24/5+21/5=9
45/5=9
9=9