Question

Daniel is three years older than twice his brother's age. Daniel is 17.

Fill in the box with the expression that represents Daniel's age in terms of his brother's age. Let b represent Daniel's brother's age.

Answer 1

2b + 3 = 17
2b = 14
b = 7

Daniel's brother's age is 7.

Hope this helps
~DragonGirl :)

Answer 2

d=daniel
brother=b
d is 3 older than 2 times b
d=3+2b
d=17
subsitute
17=3+2b
subtract 3 from both sides
17-3=3-3+2b
14=0+2b
14=2b
didivde both side by 2
7=b


daniels age in terms of his brother age is
d=3+2b