You are given a mathematical question described with a circumscribed mathematical vocabulary. Questions in this task usually contain some variables (e.g. X, Y), equations (e.g. X+Y=3) and some relationships (X is greater than Y). Often you need to find the value of the variable using equations and relationships. You are also given 4 or 5 answer options (associated with "A", "B", "C", "D", "E"). Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. LaTeX mathematical format (the standard way to express mathematical expressions in the typesetting software known as LaTeX) is used to express equations. Each question is solvable with high school math knowledge. Give only one answer for each question.

[EX Q]: What number increased by 4 is equal to 19 decreased by 4 ?
(A)10 (B)11 (C)15 (D)19 (E)27
[EX A]: B

[EX Q]: In a sequence of numbers, the first term is x and the ratio of each subsequent term to the previous term is 3 to 1. Which of the following expressions represents the difference between the fourth term and the second term?
(A)\(3x\) (B)\(9x\) (C)\(12x\) (D)\(24x\) (E)\(27x\)
[EX A]: D

[EX Q]: If \(x = \frac { 2 } { 3 } (x + y)\), which of the following is an expression for \(x\) in terms of \(y\) ?
(A)\(\frac { 2 } { 3 } y\) (B)\(y\) (C)\(\frac { 3 } { 2 } y\) (D)\(2y\) (E)\(3y\)
[EX A]:
D