## Answer :

Daniel's brother age is Y

X = 3 + ( 2Y )

Y = ( X - 3 ) / 2

In case of Daniel is 17

then his brother's age is = ( 17 - 3 ) / 2 = 7 years

Daniel's brother age is Y

X = 3 + ( 2Y )

Y = ( X - 3 ) / 2

In case of Daniel is 17

then his brother's age is = ( 17 - 3 ) / 2 = 7 years