Answer :
4x-5y=-12
-x+5y=18
find x first by eliminating y
add both of the equations
4x+-x-5y+5y=-12+18
4x-x=-12+18
3x=-12+18
3x=6
divide both sides by 3 to get x by itself
3x/3=6/3
x=2
find y by using the substitution method
-x+5y=18
-2+5y=18
move -2 to the other side
-2+2+5y=18+2
5y=20
divide both sides by 5 to get y by itself
5y/5=20/5
y=4
Answer:
(2,4)