Question

at present Maria is 8 years old than his younger brother.After 4 years Maria's age will be double the age of his brother.Let's find their present age.

Answer 1

Step-by-step explanation:

let,

maria's younger brother age is x.

at present,

Maria is (8+x) years old

after 4 year ,

brother's age will be (4+x)years

Maria's age will be (4+8+x)= (12+x) years

therefore,

(12+x) = 2*(4+x)

=> 12+x = 8+2x

=>x-2x = 8-12

=> -1x = -4

=> x = 4

at present,

Maria's younger brother is 4 years old.(ans)

and maria is (8+4)= 12 years old(ans)