I have two problems from my Algebra 2 textbook that I was given. They were A & B two-part problems. I'll only give you the first one, if you can show me how it is done, I'll then see if I can see if I can start-finish the second one on my own. Thank you.

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"In 7 and 8,a.identify the least common multiple of the denominators.b.Solve the equation.

7.m/3 + m/7 = 1"

I thank you very much if you can help me out.