document.write( "Question 762865: Mary is 41 years old and her daughter is 9. In how many years will the mother be three times as old as her daughter? \n" ); document.write( "
Algebra.Com's Answer #464240 by Cromlix(4381)\"\" \"About 
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41 + x = 9 + 3x
\n" ); document.write( "41 - 9 = 3x - x
\n" ); document.write( " 32 = 2x
\n" ); document.write( " x = 16 years
\n" ); document.write( "Proof:
\n" ); document.write( "41 + 16 = 9 + 3(16)
\n" ); document.write( " 57 = 9 + 48
\n" ); document.write( " 57 = 57
\n" ); document.write( "Hope this helps.
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