document.write( "Question 695101: The average age of a husband, wife and their son, 3 years ago was 27 years and that of the wife and son 5 years ago was 21 years. The husband’s present age is ??
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Algebra.Com's Answer #428388 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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let h = husband's present age
\n" ); document.write( "let w = wife's
\n" ); document.write( "let s = son's
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\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "The average age of a husband, wife and their son, 3 years ago was 27 years
\n" ); document.write( " $\"%28%28h-3%29%2B%28w-3%29%2B%28s-3%29%29%2F3\"$ = 27
\n" ); document.write( "Multiply both sides by 3
\n" ); document.write( "h + w + s - 9 = 3(27)
\n" ); document.write( "h + w + s = 81 + 9
\n" ); document.write( "h + w + s = 90
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\n" ); document.write( "and that of the wife and son 5 years ago was 21 years.
\n" ); document.write( " $\"%28%28w-5%29%2B%28s-5%29%29%2F2\"$ = 21
\n" ); document.write( "mult by 2
\n" ); document.write( "w + s - 10 = 2(21)
\n" ); document.write( "w + s = 42 + 10
\n" ); document.write( "w + s = 52
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\n" ); document.write( "In the 1st equation, replace w + s with 52
\n" ); document.write( "h + 52 = 90
\n" ); document.write( "h = 90 - 52
\n" ); document.write( "h = 38 yrs is the husband's age
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\n" ); document.write( "Check this
\n" ); document.write( " $\"%28%2838-3%29+%2B+%2852-6%29%29%2F3\"$ = 27\r
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