document.write( "Question 560113: bob is 1/4 as old as mary in four years from now bob will be 3/4 of marys age \n" ); document.write( "
Algebra.Com's Answer #363671 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
bob is 1/4 as old as mary in four years from now bob will be 3/4 of marys age
\n" ); document.write( "-----
\n" ); document.write( "Equations:
\n" ); document.write( "b = (1/4)m
\n" ); document.write( "(b+4) = (3/4)(m+4)
\n" ); document.write( "--------
\n" ); document.write( "Substitute for \"b\" and solve for \"m\":
\n" ); document.write( "((1/4)m + 4 = (3/4)m + 3
\n" ); document.write( "(1/2)m = 1
\n" ); document.write( "m = 2 (Mary's age now)
\n" ); document.write( "-----
\n" ); document.write( "bob = (1/4)m = 6 months (Bob's age now)
\n" ); document.write( "==========================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "=================
\n" ); document.write( "
\n" );