Question 301445
X=Y+4
2X=4Y+12
2(Y+4)=4Y+12
2Y+8=4Y+12
2Y-4Y=12-8
-2Y=4
Y=4/-2
Y=-2 ANS.
X=-2+4=2 ANS.
PROOF:
2*2=4*-2+12
4=-8+12
4=4