SOLUTION: Given that S=7a+b+7c and also S=6a+8b+6c, where 51<S<149 and S is an integer, find the sum a+b+c .
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-> SOLUTION: Given that S=7a+b+7c and also S=6a+8b+6c, where 51<S<149 and S is an integer, find the sum a+b+c .
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