SOLUTION: how would i solve this by the substitution method a=4b a-b=9

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Question 731549: how would i solve this by the substitution method a=4b
a-b=9
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
how would i solve this by the substitution method a=4b
a-b=9
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Sub for a in the 2nd equation.