SOLUTION: Carla is three times as old as John. Four years from now, Carla�s age will be half that of John�s. Find their present age.

Question 1122431: Carla is three times as old as John. Four years from now, Carla�s age will be half that of John�s. Find their present age.
Answer by Alex.33(110) (Show Source): You can put this solution on YOUR website!
Use their name initials to represent their age.
C=3J
C+4=(J+4)/2
substitute C in the second equation:
3J+2=J/2. It indicates that 3J is 2 less than J/2. Impossible.

So I'm assuming that 'Carla�s age will be half that of John�s' actually should be 'John's age will be half of Carla's'.
C=3J
(C+4)/2=J+4
Solve for C and J:
C=12
J=4

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