SOLUTION: Find values of m and b so that the solution is (-3,4). 5x+7y=b mx+y=22 I have come up with m(-3)+4=22 -15+28=6 13=b m=6

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Find values of m and b so that the solution is (-3,4). 5x+7y=b mx+y=22 I have come up with m(-3)+4=22 -15+28=6 13=b m=6      Log On


   

Question 126651This question is from textbook Beginning Algebra
: Find values of m and b so that the solution is (-3,4). 5x+7y=b mx+y=22
I have come up with m(-3)+4=22 -15+28=6 13=b m=6 This question is from textbook Beginning Algebra

Answer by madhan_math(34) About Me  (Show Source):
You can put this solution on YOUR website!
Your solution is 99% correct.
But one mistake is m(-3)+4=22,
-3m=22-4 implies that -3m=18
Therefore m=18/-3=-6
Hence m=-6.
The value of b is 13.