Question 35786
x+3=y
2x=3y-9 or x=y-3 therefore substituting y-3 for x in the second equation we get

2(y-3)=3y-9 or 2y-6=3y-9 or -y=-3 or y=3 then x=3-3 or x=0 

0+3=3 thus 0=0 & 2*0=3*3-9 or o=9-9 or 0=0