Answer:
In 28 years
Explanation:
in 28 years you will be 42 and he will be 84 which is exactly double your age.
current ages: 14 & 56
age gap: 42 years
14 yrs+28yrs=42yrs
56yrs+28yrs=84yrs
84 yrs is double 42 years because 42 times two is 84.
equation: 2(x+14)=(x+56)
x=28 use substitution
2(28+14)=(28+56)
2(42)=84
84=84 ✔️
