I've got (m+3)/5 =d and m-3=8d My teacher wrote m-3=8(d-3). But no matter which equations I use. I keep getting decimals, negative numbers, or fractions for the ages. Please help and...

I've got (m+3)/5 =d and m-3=8d My teacher wrote m-3=8(d-3). But no matter which equations I use. I keep getting decimals, negative numbers, or fractions for the ages. Please help and...

I got as far as plane speed + wind = 158 and plane speed - wind = 112. But I don't know how to solve the problem.

I understand there is a standard formula for figuring these out, but I don't really understand why. I think it's something along the lines of 0.1t +0.01h =13 and 0.01t + 0.1h = 12...

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