SOLUTION: John is three years older than Sue who is twice the age of David. write an expression for john's age in terms of D , David's age .
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Question 281583: John is three years older than Sue who is twice the age of David. write an expression for john's age in terms of D , David's age .
Found 2 solutions by Mathematicians, JBarnum:
Answer by Mathematicians(84) (Show Source): You can put this solution on YOUR website!
First I will label my variables:
J = John
S = Sue
D = David
We know J = S + 3 from John is 3 years older than Sue
We know S = 2D from Sue is twice the age of David
Lastly, we know S = 2D, so why can't the S in J = S + 3 also be 2D
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
J=john
S=sue
D=David
substitue for
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