SOLUTION: If a + 3b = 13 and a + b = 5 ,the value of b is ....

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Question 548674: If a + 3b = 13 and a + b = 5 ,the value of b is ....

Answer by richard1234(5390) About Me  (Show Source):
You can put this solution on YOUR website!
Subtract the second equation from the first equation to get 2b = 8 --> b = 4.