What is x if x + 3y = 33 and y = 10?  Choose the correct option
A) 1  B) 2  C) 3  D) 4  E) 5

Rationale: "substitute y by 10 in x + 3 y = 33 x + 3 ( 10 ) = 33 x + 30 = 33 if we substitute x by 3 in x + 30 = 33 , we have 3 + 30 = 33 . hence x = 3 correct answer c"
Answer: C