Question 157625
XY=60 OR X=60/Y
(X+1)(Y-3)=60
[(60/Y)+1](Y-3)=60
[(60+Y)/Y](Y-3)=60
(-180-3Y+60Y+Y^2)/Y=60
(Y^2+57X-180)/Y=60
Y^2+57X-180=60Y
Y^2+57Y-180-60Y=0
Y^2-3Y-180=0
(Y-15)(Y+12)=0
Y-15=0
Y=15 ANSWER.
15X=60
X=60/15
Y=4 ANSWER.
PROOF:
(4+1)(15-3)=60
5*12=60
60=60