SOLUTION: The value of a polynomial ax+by is 7 when x=3 and y=2, and is -3 when x=1 and y=2. Find a and b.

Question 808612: The value of a polynomial ax+by is 7 when x=3 and y=2, and is -3 when x=1 and y=2. Find a and b.
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
3a + 2b = 7
a + 2b = -3
a = -3 - 2b
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3a + 2b = 7
3(-3 - 2b) + 2b = 7
-9 - 6b + 2b = 7
-16 = 4b
Answer:
b = -4
a = 5
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