document.write( "Question 501771: may is 6 years younger than faye . Four years from now the product of thier ages is 352 find thier present ages \n" ); document.write( "
Algebra.Com's Answer #338808 by Maths68(1474) You can put this solution on YOUR website! Let \n" ); document.write( "Present age of May = m \n" ); document.write( "Present age of Faye = f \n" ); document.write( "May is 6 years younger than Faye means if we subtract 6 from the Faye's age both Faye and May will be of equal age \n" ); document.write( "m=f-6.......................(1) \n" ); document.write( "Four years from now means we have to add 4 in present age of May and Faye \n" ); document.write( "f+4=m+4 \n" ); document.write( "then the product of thier ages is 352 \n" ); document.write( "(f+4)(m+4)=352 \n" ); document.write( "fm+4f+4m+16=352 \n" ); document.write( "fm+4f+4m=352-16 \n" ); document.write( "fm+4f+4m=336 .................(2) \n" ); document.write( "Put the value of m from (1) to (2) \n" ); document.write( "f(f-6)+4f+4(f-6)=336 \n" ); document.write( "f^2-6f+4f+4f-24=336 \n" ); document.write( "f^2-6f+8f=336+24 \n" ); document.write( "f^2+2f=360 \n" ); document.write( "f^2+2f-360=0 \n" ); document.write( "Now solve for f \n" ); document.write( "f^2-18f+20f-360=0 \n" ); document.write( "f(f-18)+20(f-18)=0 \n" ); document.write( "(f-18)(f+20)=0 \n" ); document.write( "f-18= o or f+20=0 \n" ); document.write( "f=18 or f=-20(Impossible) \n" ); document.write( "so \n" ); document.write( "f=18 \n" ); document.write( "Put the value of f in (1) \n" ); document.write( "m=f-6 \n" ); document.write( "m=18-6 \n" ); document.write( "m=12\r \n" ); document.write( "\n" ); document.write( "May is 12 and Faye is 18 years old \n" ); document.write( " \r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |