What is the value of x?

20
35
60
70

--
i know you get for the answer as 20 and when you plug it in its 60, but i dont know which answer i answer the question with

What is the value of x 20 35 60 70 i know you get for the answer as 20 and when you plug it in its 60 but i dont know which answer i answer the question with class=