A student chose a number, multiplied it by 7, then subtracted 150 from the result and got 130. What was the number he chose? Choices:
A) 40
B) 42
C) 44
D) 46
E) 48

Rationale: "let x be the number he chose , then 7 ⋅ x − 150 = 130 7 x = 280 x = 40 correct answer a"
Answer: A