Half a number plus 7 is 17.What is the number?  Choose the correct choice from the following choices.
A) 8 B) 9 C) 10 D) 11 E) 20

Rationale: "let x be the number . always replace ` ` is ' ' with an equal sign ( 1 / 2 ) x + 7 = 17 ( 1 / 2 ) x = 17 - 7 ( 1 / 2 ) x = 20 x = 20 correct answer is e"
Answer: E