document.write( "Question 1021563: Ali's age now is his dad's when Ali was 5 years old. When his dad reaches 71, Ali will be his dad's age now. What is the age for both of them now? \n" ); document.write( "
Algebra.Com's Answer #637872 by ankor@dixie-net.com(22740)\"\" \"About 
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What is the age for both of them now?
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\n" ); document.write( "let a = Ali's present age
\n" ); document.write( "let d = Dad's present age
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\n" ); document.write( "let x = (d-a), the difference in their ages
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\n" ); document.write( "\"Ali's age now is his dad's when Ali was 5 years old.\"
\n" ); document.write( "a = x + 5
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\n" ); document.write( "\" When his dad reaches 71, Ali will be his dad's age now.\"
\n" ); document.write( "d = 71 - x
\n" ); document.write( "a + x = d
\n" ); document.write( "d = d, therefore
\n" ); document.write( "a + x = 71 - x
\n" ); document.write( "a = 71 - x - x
\n" ); document.write( "a = 71 - 2x
\n" ); document.write( "replace a with (x+5) from the first statement
\n" ); document.write( "x + 5 = 71 - 2x
\n" ); document.write( "x + 2x = 71 - 5
\n" ); document.write( "3x = 66
\n" ); document.write( "x = 66/3
\n" ); document.write( "x = 22 yrs is the difference in their ages
\n" ); document.write( "therefore
\n" ); document.write( "a = 22 + 5
\n" ); document.write( "a = 27 yrs is Ali's age
\n" ); document.write( "and
\n" ); document.write( "d = 71 - 22
\n" ); document.write( "d = 49 yrs is Dad's age, 22 yrs older than Ali\r
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