Question

Explain, in complete sentences, how you would use the substitution method to solve the following system of equations. Provide the solution to the system.
2x - y = 5
x + 2y = 15

Answer 1

Do you need help explaining it or solving it?

Answer 2

solving pleeeeeasseeee

Answer 3

Okay so you need to choose a variable and equation in which to substitute. Let's take equation two and sub x in.

Answer 4

1 Rearrange equation 2.
x+2y=15
x=15-2y

Answer 5

2. Now we sub x into equation 1.
2(15-2y)-y=5
30-4y-y=5
-5y=5-30
-5y=-25
y=5

Answer 6

3. Now that we have solved for y we can find x.
x=15-2*5
=15-10
=5

So x and y are both 5