Question

Use substitution to solve the system of equations. Enter your answer as an ordered pair; example: (4, -5)
y = 3x + 5
x = -3y - 5

Answer 1

First, let's solve for y by substituting x into the equation.
y = 3x + 5
y = 3(-3y-5) + 5
y = -9y - 15 + 5
y = -9y -10
y + 9y = -9y + 9y -10
10y = -10
10y/10 = -10/10
y = -1

Next, we solve for x by substituting y into the equation
x = -3y - 5
x = -3(-1) - 5
x = 3-5
x = -2

to double check the work, plug x into the first equation
y = 3x + 5
y = 3(-2) + 5
y = -6 + 5
y = -1
which is what we came up with above

so you have x = -2 and y = -1
(-2, -1)

Answer 2

You could have also solved for x first and done the same thing