



 
Dee, Each of these problems involve reciprocals. It is explicit in the first problem. Suppose the two numbers are x and y then one is three times the other so I can say y = 3x. The second fact you are told is that if each is increased by 1 (so the numbers would be x + 1 and y + 1) then the sum of the reciprocals is 10/21. Thus
Use the expression y = 3x to write this equation in terms of the one variable x. Add the fractions on the left side and solve for x. I hope this helps,  


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