I have a problem that I solved however my teacher says ‘Y

I have a problem that I solved, however, my teacher says, ‘Your answer is correct, but it would be nice to see the algebra involved in solving an inverse variation problem.’This is the problem and my answer:The time required to do a job varies inversely as the number of people working. It takes 5hr for 7 bricklayers to build a park well. How long will it take 10 bricklayers to complete the job? 5 x 7 = 35 hr.35hr/ 10 = 3.5 hr.Can you help me with this please?

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