Question

there was 2 brother if their combined age is 11 and their age gap is 10 years​

Answer 1

Step-by-step explanation:

let ages=x,y

x+y=11 equation 1st

x-y=10 equation 2nd

from eq. 2nd

x-y=10

x=10+y eq.3rd

put 3rd eq. values in 1st eq.

x+y=11

10+y+y=11

2y=11-10

y=1/2

put y value in eq.3rd

x=10+1/2

x=20/2+1/2

x=21/2