document.write( "Question 1154094: Mary is less than 15 years old. She is half as old as Justin. In 11 years she will be 2/3 years old as Justin. How old is Justin?
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #776482 by MathTherapy(10552) $\"\"$ $\"About$

You can put this solution on YOUR website!
Mary is less than 15 years old. She is half as old as Justin. In 11 years she will be 2/3 years old as Justin. How old is Justin?
\n" ); document.write( "

Mentioning that Mary is < 15 years-old serves no purpose, whatsoever.
\n" );
document.write( "Let Justin's age be J
\n" );
document.write( "Then Mary's is: 
\n" );
document.write( "We then get: 
\n" );
document.write( "3J + 66 = 4J + 44 ------ Multiplying by LCD, 6
\n" );
document.write( "3J - 4J = 44 - 66
\n" );
document.write( "- J = - 22
\n" );
document.write( "J, or  \n" );
document.write( "

\n" );