Question

nine year later ,age of B will beequal to the present age of A's age 3yearlater and B's age 4 years ago is 76 .if C is half of the present of B .the what will be C's age (in year) after 10 years

Answer 1

let the present  age of a be x years 
and the present age of b be y years

y-4 = 76 
y = 80 years

present age of C = 80/2 = 40 years 
10 years later 50 years 

Answer 2

age of B 4 year ago is =76
present age=X
then X-4=76
X=80
c is half of the age of B=40
after 10years the age of c=40+10
= 50