document.write( "Question 72176: 7 years ago i was 11 times as old as my daughter. Now i am 4 times as old as her. How old am i? \n" ); document.write( "
Algebra.Com's Answer #51594 by ankor@dixie-net.com(22740)\"\" \"About 
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\n" ); document.write( "Let A = my age now
\n" ); document.write( "Let D = daughter's age now
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\n" ); document.write( "In 7 years: my age = (A-7) and daughter's age (D-7)
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\n" ); document.write( "\"7 years ago i was 11 times as old as my daughter\".
\n" ); document.write( "(A-7) = 11(D-7)
\n" ); document.write( "A - 7 = 11D - 77
\n" ); document.write( "A = 11D - 77 + 7; add 7 to both sides
\n" ); document.write( "A = (11D - 70)
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\n" ); document.write( "\"Now i am 4 times as old as her.\"
\n" ); document.write( "A = 4D
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\n" ); document.write( " How old am i?
\n" ); document.write( "Substitute (11D-70) for A in the above equation:
\n" ); document.write( "11D - 70 = 4D
\n" ); document.write( "11D - 4D = +70
\n" ); document.write( "7D = 70
\n" ); document.write( "D = 70/7
\n" ); document.write( "D = 10 yrs is the daughter's present age
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\n" ); document.write( "Remember A = 4D
\n" ); document.write( "A = 4(10)
\n" ); document.write( "A = 40 yrs is my age now
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\n" ); document.write( "Confirm that the statement \"7 years ago i was 11 times as old as my daughter.\"
\n" ); document.write( "40 - 7 = 11(10-7)
\n" ); document.write( "33 = 33
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\n" ); document.write( "Could you follow the reasoning on this OK? \n" ); document.write( "
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