Answer:
Charles = 18
Barbara = 3
Step-by-step explanation:
Currently
Charles: x+15
Barbara: x
In twelve years
Charles: x+27
Barbara: x+12
Equation - Charles's age in twelve years will be double Barbara's age in twelve years. Using the information about, create the equation
x+27=2(x+12)
x+27=2x+24
x=3
