SOLUTION: Today, Alan's son is exactly one fifth of Alan's age.
In 21 years, Alan will be exactly twice his son’s age.
Algebra.Com
Question 984683: Today, Alan's son is exactly one fifth of Alan's age.
In 21 years, Alan will be exactly twice his son’s age.
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
.
A=Alan's age; S=son's age
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A=5S
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A+21=2(S+21) Substitute for A
5S+21=2S+42
3S=21
S=7
A=5S=5(7)=35
Alan is 35 years old and his son is 7 years old.
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