Mat 7) solve the system by substitution -4.5x-2y=-12.5 3.25x-y=-0.75

1.) multiply the equation 3.25x-y=-0.75 by -2 to get rid of the y and isolate "x." So:

-2(3.25z-y=-0.75)

2.) if you do this, you will get: -6.5x+2y=1.5 Next, you will use process of elimination and get rid of the y.

-4.5x-2y=12.5
-6.5x+2y=1.5
__________
-> -11x=-11

3.) Now you will divide each side by -11 to isolate the x.

-11x = -11
___ ___
-11 -11

->> x=1

4.) Now substitute 1 in every x value you see in either equation. Look in the picture attachment for the one I worked out for substitution. Enjoy and good luck with your work. :)