Question

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. (5 points)

Answers

GPT 3.5
To solve the pair of equations by substitution, we will first rearrange the first equation to solve for x:

y = x + 4
x = y - 4

Then we substitute x = y - 4 into the second equation:

y = -2(y - 4) - 2
y = -2y + 8 - 2
y = -2y + 6
3y = 6
y = 2

Now that we have found the value of y, we can substitute it back into the first equation to solve for x:

x = 2 - 4
x = -2

Therefore, the solution to the pair of equations is (-2, 2).