SOLUTION: Solve by the elimination method. 7r - 4s =24 4r + 7s =88

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Question 148295: Solve by the elimination method.
7r - 4s =24
4r + 7s =88

Answer by Alan3354(69443) About Me  (Show Source):
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Solve by the elimination method.
7r - 4s =24 eqn 1
4r + 7s =88 eqn 2
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49r - 28s = 168 eqn 1 x 7
16r + 28s = 352 eqn 2 x 4
Add
65r = 520
r = 8
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Sub into either eqn
7*8 -4s = 24
56 - 4s = 24
-4s = -32
s = 8