SOLUTION: Please help me solve this question: Solve using the substitution method: r=-3s r+4s=10 I don't understand how to write it out or what numbers to use. Thanks, Deb

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Please help me solve this question: Solve using the substitution method: r=-3s r+4s=10 I don't understand how to write it out or what numbers to use. Thanks, Deb      Log On


   

Question 373966: Please help me solve this question:
Solve using the substitution method:
r=-3s
r+4s=10
I don't understand how to write it out or what numbers to use.
Thanks,
Deb
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Solve using the substitution method:
r=-3s
r+4s=10
--------
Sub for r in the 2nd equation
r + 4s = 10
-3s + 4s = 10
s = 10
--------
r = -3s
r = -30