SOLUTION: find the LCD for the following pair of rational expressions: -5a/7a+7b, 5b/3a+3b

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Question 879456: find the LCD for the following pair of rational expressions:
-5a/7a+7b, 5b/3a+3b
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
-5a/7a+7b, 5b/3a+3b
-5a/7(a+b), 5b/3(a+b)
21(a+b) LCD