Question 551996
GIVEN:
 2x+3y=-4
 x-2y=5

 --(use the second given to look for the X)
 x-2y=5
(transfer the -2y to the other side)
 x=2y+5 (use this one to solve or the X)

 --(now use the first given to substitute the second given)
 2x+3y=-4
 2(2y+5)+3y=-4
 4y+10+3y=-4
 7y+10=-4
 7y=-10-4
 7y=-14
 (divide both sides with 7)
 y=-2 (answer for Y)

 --(NOW, use the second given to solve for X)
 x-2y=5
 x-2(-2)=5
 x+4=5
 x=-4+5
 x=1(answer for X)