SOLUTION: if 3a-c=5b and 3a+3b-c=40, what is teh value of b?

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Question 470152: if 3a-c=5b and 3a+3b-c=40, what is teh value of b?
Answer by Tatiana_Stebko(1539)   (Show Source): You can put this solution on YOUR website!

Subtract the first equation from the second one





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