A student chose a number, multiplied it by 2, then subtracted 138 from the result and got 102. What was the number he chose?
Choose the correct choice from the following answers.
A) 90	B) 100	C) 120	D) 160	E) 200

Rationale: "solution : let x be the number he chose , then 2 * x * 138 = 102 2 x = 240 x = 120 correct answer c"
Answer: C