document.write( "Question 1173216: Mum is 3 times as old as I am. she was 30 when I was born. what are our ages? \n" ); document.write( "
Algebra.Com's Answer #798397 by Theo(13342)\"\" \"About 
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m = mum's age.
\n" ); document.write( "s = son's age.
\n" ); document.write( "mum is 3 times the age of son.
\n" ); document.write( "equation for that is:
\n" ); document.write( "m = 3s
\n" ); document.write( "mum was 30 when son was born.
\n" ); document.write( "equation for that is:
\n" ); document.write( "m - s = 30
\n" ); document.write( "solve for m in this equation to get:
\n" ); document.write( "m = s + 30
\n" ); document.write( "in the equation of m = 3s, replace m with s + 30 to get:
\n" ); document.write( "s + 30 = 3s
\n" ); document.write( "subtract s from both sides of this equation to get:
\n" ); document.write( "30 = 2s
\n" ); document.write( "solve for s to get s = 30/2 = 15
\n" ); document.write( "since m = 3s, then m must be 45.
\n" ); document.write( "that should be y our answers.
\n" ); document.write( "mum is 45 years old and son is 15 years.
\n" ); document.write( "45 / 15 = 3 means mum is 3 times as old as son today.
\n" ); document.write( "45 - 15 = 0 means mum was 30 years old when she had son.
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