document.write( "Question 893040: mary is twice as old as john and half as old as bob.in 2 years times,bob will be twice as old as john.how old is marry? \n" ); document.write( "
Algebra.Com's Answer #541066 by ankor@dixie-net.com(22740)\"\" \"About 
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Mary is twice as old as john.
\n" ); document.write( "m = 2j
\n" ); document.write( " and half as old as bob.
\n" ); document.write( "m = .5b
\n" ); document.write( "or multiply both sides by 2 and you have:
\n" ); document.write( "b = 2m
\n" ); document.write( ":
\n" ); document.write( "in 2 years times, bob will be twice as old as john.
\n" ); document.write( "b + 2 = 2(j+2)
\n" ); document.write( "b + 2 = 2j + 4
\n" ); document.write( "b = 2j + 4 - 2
\n" ); document.write( "b = 2j + 2
\n" ); document.write( "Replace 2j with m (from the 1st statement)
\n" ); document.write( "b = m + 2
\n" ); document.write( "replace b with 2m (from the 2nd statement)
\n" ); document.write( "2m = m + 2
\n" ); document.write( "2m - m = 2
\n" ); document.write( " m = 2 yrs is Mary's age\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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