SOLUTION: Solve using the multiplication principle first, then the elimination method: 7p+5q=2, 8p-9q=17

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Question 414456: Solve using the multiplication principle first, then the elimination method:
7p+5q=2, 8p-9q=17
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Solve using the multiplication principle first, then the elimination method:
7p+5q=2
8p-9q=17
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Multiply thru 1st by 9.
Multiply thru 2nd by 5.
----
63p + 45q = 18
40p - 45q = 85
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Add to get:
103p = 103
p = 1
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Solve for "q":
7p + 5q = 2
7 + 5q = 2
5q = -5
q = -1
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Cheers,
Stan H.
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