Jason is 11 years old. His older brother is 5 years less than twice as old as he is. How old is Jason's older brother? In 3 years Jason will be twice as old as his younger brother. How old is Jason's younger brother now?​

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Older brother:

x+5=2*11

x=17

younger brother

2*(y+3)=11+3

y=4

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490