exam Maths Puzzle Numerical Ability

3m=2n-9

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exam Other Question

I don't get this question. I know it hads to do with ax+by+c=0. If you can help me that will be great because I have a test on this. three times a number increades 5 times another number is 49 but twice the second number exceeds 5 times the first number by 1.what are the numbers?