Question 1122431
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