SOLUTION: Solve the pairs of equations using the addition or subtraction method. x + y = 15 x - y = 3 I have: 2x = 18 x = 9, but I don't know if it's right and Ican't figure o

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Solve the pairs of equations using the addition or subtraction method. x + y = 15 x - y = 3 I have: 2x = 18 x = 9, but I don't know if it's right and Ican't figure o      Log On


   

Question 43955: Solve the pairs of equations using the addition or subtraction method.

x + y = 15
x - y = 3
I have: 2x = 18 x = 9, but I don't know if it's right and Ican't figure out the rest.
Answer by benni1013(206) About Me  (Show Source):
You can put this solution on YOUR website!
All you have to do now is plug and chug. Plug in 9 for x and see if the answers are the same for both y's if they are you are 100% correct.