document.write( "Question 657861: at the moment john is 5 years older than mary. in seven years mary age will be 3/4 of john age how old are they now? \n" ); document.write( "
Algebra.Com's Answer #410037 by lwsshak3(11628)\"\" \"About 
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at the moment john is 5 years older than mary. in seven years mary age will be 3/4 of john age how old are they now?
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\n" ); document.write( "let x=mary's age now
\n" ); document.write( "x+5=john's age now
\n" ); document.write( "7 years hence:
\n" ); document.write( "x+7=mary's age
\n" ); document.write( "x+5+7=x+12=john's age
\n" ); document.write( "..
\n" ); document.write( "x+7=(3/4)(x+12)
\n" ); document.write( "4x+28=3x+36
\n" ); document.write( "x=36-28=8
\n" ); document.write( "x+5=13
\n" ); document.write( "mary's age now=8
\n" ); document.write( "john's age now=13
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