document.write( "Question 440232: Tom is three times as old as Mark. Twice Mark's age plus Tom's age is 90. How old is each person \n" ); document.write( "
Algebra.Com's Answer #304156 by rwm(914)\"\" \"About 
You can put this solution on YOUR website!
we have two unknowns so we need two equations.
\n" ); document.write( "t=3m
\n" ); document.write( "2m+t=90
\n" ); document.write( "2m+3m=90
\n" ); document.write( "5m=90
\n" ); document.write( "m=18
\n" ); document.write( "t=54
\n" ); document.write( "check
\n" ); document.write( "36+54=90
\n" ); document.write( "ok
\n" ); document.write( "
\n" ); document.write( "
\n" );