Can anyone me with the process of substitution in algebra i? it's much appreciated!
here's an example problem

Ok what you have to do is get one variable in the two equations equal but opposite to each other. You already have that in y in the first one and -y in the second. Sometimes you would have to do some manipulation to get there.

Next, add the two together:

4x+y=-5
+ 2x-y=-1
---—
6x=-6
x-1

Now plug in the -1 for x in one of the formulas above:
4(-1)+y=-5 solve for y
-4+y=-5
y=-5+4
y=-1