document.write( "Question 1109788: Christian is 3 times as old as Marie. Marie is 12 years younger than Christian. How old is Christian? \n" ); document.write( "
Algebra.Com's Answer #724762 by ankor@dixie-net.com(22740)\"\" \"About 
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Christian is 3 times as old as Marie.
\n" ); document.write( "c = 3m
\n" ); document.write( " Marie is 12 years younger than Christian.
\n" ); document.write( "m = c - 12
\n" ); document.write( "Replace c with 3m, from the first statement
\n" ); document.write( "m = 3m - 12
\n" ); document.write( "m - 3m = -12
\n" ); document.write( "-2m = -12
\n" ); document.write( "m = -12/-2
\n" ); document.write( "m = +6 is Marie's age
\n" ); document.write( ":
\n" ); document.write( " How old is Christian?
\n" ); document.write( "c = 3(6)
\n" ); document.write( "c = 18 is Christian's age
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check solutions in the 2nd statement
\n" ); document.write( "\" Marie is 12 years younger than Christian.\"
\n" ); document.write( "6 = 18 - 12 \n" ); document.write( "
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