document.write( "Question 466521: When Simon was born, his father was 36 years old. Five years ago, his father was twice as old as Simon will be in 7 years time. How old is Simon? \n" ); document.write( "
Algebra.Com's Answer #319890 by ankor@dixie-net.com(22740)\"\" \"About 
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When Simon was born, his father was 36 years old.
\n" ); document.write( "Five years ago, his father was twice as old as Simon will be in 7 years time.
\n" ); document.write( " How old is Simon?
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\n" ); document.write( "Let s = Simon's age
\n" ); document.write( "Let f = father's age
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\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "\"When Simon was born, his father was 36 years old.\"
\n" ); document.write( "f = s + 36
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\n" ); document.write( "\"Five years ago, his father was twice as old as Simon will be in 7 years time.\"
\n" ); document.write( "f - 5 = 2(s+7)
\n" ); document.write( "f - 5 = 2s + 14
\n" ); document.write( "f = 2s + 14 + 5
\n" ); document.write( "f = 2s + 19
\n" ); document.write( "Replace f with (s+36)
\n" ); document.write( "f + 36 = 2s + 19
\n" ); document.write( "36 - 19 = 2s - s
\n" ); document.write( "17 = s, Simon is 17 yrs old
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\n" ); document.write( "Check solution in the statement (father is: 17 + 36 = 53 yrs old)
\n" ); document.write( "\"Five years ago, his father was twice as old as Simon will be in 7 years time\"
\n" ); document.write( "53 - 5 = 2(17 + 7)
\n" ); document.write( "48 = 2(24)\r
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