document.write( "Question 754065: If a son is 1/4 his mother's age, and she is 21 years older than her son, how old is the son? \n" ); document.write( "
Algebra.Com's Answer #458772 by blueplanet(7)\"\" \"About 
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Let the mother's age be X.
\n" ); document.write( "Her son age is X-21
\n" ); document.write( "According to the equation, the son is 1/4 his mother's age. This means that:
\n" ); document.write( "X-21 = X/4 ---- (1)
\n" ); document.write( "Solving this equation, we get X=28, which is the mother's age. The son's age is 28-21= 7 years old.
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