Question

PLEASE HEEEEEELP

Consider the following pair of equations:

y = x + 4
y = −2x − 2

Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

Answer 1

First thing to note is that both equations equal y, and therefore equal each other. Set this up as so:
x + 4 = - 2x - 2
Next, you will move all integers to one side, and variables to the other, also known as isolating.
Add 2 to both sides and subtract x from both sides. It will give you this:
6 = - 3x
Now divide both sides by - 3
- 2 = x

You may choose whichever equation you would like to plug x into. For a more simplistic way, choose the first one.

y = - 2 + 4
y = 2

With both x and y, you have your solution: (-2,2)