Question

What is the solution to the system of equations?

Use the substitution method to solve.

6=−4x+y

−5x−y=21

Answer 1

6=4x+y -5x-y=21
y=6+4x y=-5x-21
6+4x=-5x-21
6=-9x-21
27=-9x
-3=x

Answer 2

x=-3, and y=-6. To show how you worked the problem, you would have to move around one of the equations, and then substitute the variable.