Solve the system by substitution:

-4.5x-2y=-12.15
3.25x-y=-0.75

1 answer

-4.5 x - 2 y = -12.15
3.25 x - 1 y = -0.75 mult by 2

-4.5 x - 2 y = -12.15
6.50 x - 2 y = -1.50
---------------------subtract
-11 x + 0 = -10.65
so
x = 10.65/11 etc