{x-3y=9 {x+4y=2
If you rewrite the FIRST equation x = 9 + 3y substitute this value of x into the second equation
x + 4y = 2
9+3y+4y=2
7y = -7
y=-1 Substitute this into one of the original equations to find x
x - 3 (-1) = 9
x +3 = 9
x = 6
+37093 
