SOLUTION: the problem is x +5 over 7 divided by 4x + 20 over 9. I inverted and multiplied and got 9x +45 over 28x + 140 and don't know where to go from there.

SOLUTION: the problem is x +5 over 7 divided by 4x + 20 over 9. I inverted and multiplied and got 9x +45 over 28x + 140 and don't know where to go from there.

Algebra.Com

Question 21698: the problem is x +5 over 7 divided by 4x + 20 over 9.
I inverted and multiplied and got 9x +45 over 28x + 140 and don't know where to go from there.
Answer by algebrapro18(249) (Show Source): You can put this solution on YOUR website!
actually after you invert you can factor out a 4 from 4x+20 and the x+5's will then cancel leaving you with 1/7 * 9/4 = 9/28
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