SOLUTION: 5x(a-9)-4(9-a) could really use some help factoring this one

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Question 46723: 5x(a-9)-4(9-a)
could really use some help factoring this one
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
5x(a - 9) - 4(-a + 9)
5x(a - 9) + 4(a - 9)
(5x + 4)(a - 9)