How to solve stated problem: Frank is 5 years older than...

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How to solve stated problem: Frank is 5 years older than...

Postby Mathisgood on Tue Jun 17, 2014 11:24 pm

Frank is 5 years older than Harry.Two years ago the product of their ages was 30 less than it is now. How old is each now?

I wrote this equation, having Frank's age be x + 5 and Harry's age x.

x(x +5) -2 = y(y+5) -30, but I don't know how to proceed to get an answer that would make sense. I don't know of any other way to write an equation for this problem.

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Re: How to solve stated problem: Frank is 5 years older than

Postby theshadow on Wed Jun 18, 2014 1:50 pm

Mathisgood wrote:Frank is 5 years older than Harry.Two years ago the product of their ages was 30 less than it is now. How old is each now?

I wrote this equation, having Frank's age be x + 5 and Harry's age x.

x(x +5) -2 = y(y+5) -30...

What is y? Also, the question says "2 yrs ago the product of their ages was", not "the product of their ages, less yrs". You have to take off the 2yrs first:

Frank: (x+5)-2=x+3
Harry: x-2

Then do the product.
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