Question 32461
2X+2Y=1100 & X*Y=60000 THEREFORE 2X=1100-2Y OR X=(1100-2Y)/2 OR X=550-Y
SUBSTITUTING IN EQUATION 2 WE GET (550-Y)Y=60000 OR 550Y-Y~2=60000 OR 
-Y~2+550-60000=0 OR Y~2-550+60000 OR (Y-400)(Y-150)=0 OR Y=400 THEN 
X=60000/400 OR X=150 OR Y=150 THEN X=60000/150 OR X=400
PROOF 2*400+2*150=1100 OR 800+300=1100