document.write( "Question 1169526: The difference of three times Faye’s age and four times Joshua’s age is 31. If Faye’s age is five more than twice Joshua’s age, how old is Faye?
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\n" ); document.write( "The difference of three times Faye’s age and four times Joshua’s age is 31. If Faye’s age is five more than twice Joshua’s age, how old is Faye?
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Let Faye's, and Joshua's ages be F and J, respectively
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document.write( "Then we get: 3F + 4J = 31 ------ eq (i)
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document.write( "Also, F = 2J + 5____F - 2J = 5 ------ eq (ii)
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document.write( "Multiply eq (ii) by 2 to get eq (iii), and then add eqs (iii) and (i).
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document.write( "This will ELIMINATE J, or Joshua's age and give you Faye's! \n" );
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