document.write( "Question 335851: Jonh is tree times as old as sarah, last year jonh was four times as lod as sarah. So how old is sarah and jonh now?? \n" ); document.write( "

Algebra.Com's Answer #240867 by mananth(16946) $\"\"$ $\"About$

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Sarah be x years
\n" ); document.write( "John = 3x years
\n" ); document.write( "..
\n" ); document.write( "last year
\n" ); document.write( "sarah was x-1
\n" ); document.write( "John was 3x-1
\n" ); document.write( "..
\n" ); document.write( "3x-1=4(x-1)
\n" ); document.write( "3x-1=4x-4
\n" ); document.write( "add 1 to both sides
\n" ); document.write( "3x+1-1=4x+1-4
\n" ); document.write( "3x=4x-3
\n" ); document.write( "add -4x to both sides
\n" ); document.write( "3x-4x=4x-4x-3
\n" ); document.write( "-x=-3
\n" ); document.write( "divide by -1
\n" ); document.write( "x= 3
\n" ); document.write( "sarah = 3 years
\n" ); document.write( "John = 3x = 9 years \n" ); document.write( "

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