+128406 -4.5x - 2y = -12.5 (1)
3.25x - y = -0.75 → y = 3.25x + 0.75 (2)
Put (2) into (1)
-4.5x - 2 ( 3.25x + 0.75 ) = -12.5 simplify
-4.5x - 6.5x - 1.5 = -12.5
-11x - 1.5 = -12.5 add 1.5 to both sides
-11x = -11 divide both sides by -11
x = 1
And using ( 2)
y = 3.25 (1) + 0.75 = 4
