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Question About Algebra

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Rewriting Equations: Solve the equation for Y. Then find the value of Y for the given value of X.

9x-6y = 63; x = 5

What does it mean by "Then find the value of Y for the given value of X."?
 Aug 20, 2013

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first part: rearrange to make y the subject.

y = (-63*9)/(9*x)

second part: "then find the value of Y for the given value of X", i.e. substitute x for 5 in the equation and find the value it gives for y:

y = (-63*9)/(9* 5) = ?
 Aug 20, 2013

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