SOLUTION: Find values for m and b in the system 5x+7y=b, mx+=22 so that the solution to the system is (-3,4). don't understand this problem

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Question 121842: Find values for m and b in the system 5x+7y=b, mx+=22 so that the solution to the system is (-3,4).
don't understand this problem
Answer by jecegc(3) About Me  (Show Source):
You can put this solution on YOUR website!
plug in (-3, 4) into x and y and solve for m and b