Question

-2x + 3y = 8
3x – y = -5

Answer 1

system of equations

Answer 2

We could try to isolate y
3x -y = -5
3x = -5 + y
3x + 5 = y
Then we substitute for y in the first.
-2x + 3(3x+5) = -2x +9x + 15 = 7x + 15
7x + 15 = 8
7x = 8-15 = -7
x = -7 / 7 = -1.

Now we use this in the second one.
3*-1 - y = -5
-3 -y = -5
-y = -2
y = 2

Answer 3

Here is what I would do.
Get the equation "3x – y = -5" and solve it for "y"

Then plug in this equation into the first equation.