document.write( "Question 536222: marks dad is 3 times as old as mark . The sum of their ages is 48 , how old is mark? \n" ); document.write( "

Algebra.Com's Answer #352201 by oberobic(2304) $\"\"$ $\"About$

You can put this solution on YOUR website!
Dad = 3*Mark
\n" ); document.write( "D = 3M
\n" ); document.write( ".
\n" ); document.write( "D+M = 48
\n" ); document.write( "so
\n" ); document.write( "D = 48-M
\n" ); document.write( ".
\n" ); document.write( "substitute
\n" ); document.write( ".
\n" ); document.write( "48-M = 3M
\n" ); document.write( "48 = 4M
\n" ); document.write( "4M = 48
\n" ); document.write( "M = 12
\n" ); document.write( ".
\n" ); document.write( "D = 3M
\n" ); document.write( "D = 3*12 = 36
\n" ); document.write( ".
\n" ); document.write( "Answer: Mark's dad is 36, and Mark is 12.
\n" ); document.write( ".
\n" ); document.write( "Done. \n" ); document.write( "

\n" );