Question

Jane is Billy's sister, Jane is 3 years older than 2 times Billy's age. If Billy is 7 years old then how old is Jane?

Answer 1

J(Jane) + 3 = B(Billy)*2
J + 3 = 7(2)
J + 3 = 14
J = 14-3
J = 11 (Jane is 11)Cheers!

Answer 2

2 x 7(billy's age) = 14
^2 times billy's age

14 + 3 = Jane's age
^3 years older(added) than 2 times billy's age

17 = Jane's age

hope this helps and have a great day :)