SOLUTION: I know the answer is 7 but how would you show the work for this question: For what value of a is a(x-5)=9x-25-2x-10 an identity?

Question 217280: I know the answer is 7 but how would you show the work for this question: For what value of a is a(x-5)=9x-25-2x-10 an identity?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
There are two ways to do this, here's one way:

Start with the given equation.

Combine like terms.

Factor out the GCF 7 from the right side.

Divide both sides by .

Simplify

So the value makes an identity. Go ahead and try to solve to confirm the answer.
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