document.write( "Question 1166098: Randall is 75 years younger than karissa. 9 years ago karissas age was 4 times Randall’s age. How old is Randall now? \n" ); document.write( "
Algebra.Com's Answer #790576 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
The site has so many of these. Students should be able to find a gigantic number of them already solved.\r
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\n" ); document.write( "PersonOne is n years younger than personTwo. p years ago, personTwo's age was k times personOnes age. How old is each person now?
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\n" ); document.write( "\n" ); document.write( "x, age of personOne
\n" ); document.write( "y, age of personTwo\r
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\n" ); document.write( "\n" ); document.write( "\"system%28x=y-n%2Cy-p=k%28x-p%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "Substituting x from first equation into the second equation
\n" ); document.write( "\"y-p=k%28y-n-p%29\"
\n" ); document.write( "\"y-p=ky-kn-kp\"
\n" ); document.write( "\"ky-kn-kp=y-p\"
\n" ); document.write( "\"ky-y=-p%2Bkn%2Bkp\"
\n" ); document.write( "\"y%28k-1%29=kn%2Bkp-p\"
\n" ); document.write( "\"highlight%28y=%28kn%2Bkp-p%29%2F%28k-1%29%29\"-----------personTwo's age\r
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\n" ); document.write( "\n" ); document.write( "Now to FIND for x
\n" ); document.write( "Use \"y=x%2Bn\"; substitute.
\n" ); document.write( "\"x%2Bn-p=k%28x-p%29\"
\n" ); document.write( "\"x%2Bn-p=kx-kp\"
\n" ); document.write( "\"n-p=kx-kp-x\"
\n" ); document.write( "\"n-p%2Bkp=kx-x\"
\n" ); document.write( "\"n-p%2Bkp=%28k-1%29x\"
\n" ); document.write( "\"highlight%28x=%28n-p%2Bkp%29%2F%28k-1%29%29\"------------personOne's age
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