Question

2y + x = -15 , x=3y substitution method

Answer 1

Answer:

x = -9, y = -3.

As an ordered pair it is (-9, -3).

Step-by-step explanation:

Substitute x = 3y in equation 1:

2y + 3y = -15

5y = -15

y = -15/5

y = -3.

Now find x by plugging y = -3 in x = 3y:

x = 3*-3 = -9.

Check the answer in equation 1:

2(-3) + -9

= -6 - 9

= -15  Correct.