Simplify the Expression and Solve the Equation $\frac{2 x}{7}+\frac{x}{4}=\frac{5}{2}$ (B) $\frac{2 x}{7}+\frac{x}{4}-\frac{5}{2}$

Simplify the expression and solve the equation.
-One of the following is an expression to be simplified by algebraic operations, and the other is an equation to be solved. Identify each, and then simplify the one that is an expression and solve the one that is an equation.
(a) $\frac{2 x}{7}+\frac{x}{4}=\frac{5}{2}$

(b) $\frac{2 x}{7}+\frac{x}{4}-\frac{5}{2}$

A) (a) Equation. The solution to the equation is: $\frac{7}{3}$
(b) Expression. The simplified form of the expression is: $\frac{15}{28} x-\frac{5}{2}$
B) (a) Equation. The solution to the equation is: $\frac{70}{13}$
(b) Expression. The simplified form of the expression is: $\frac{15}{28} x-\frac{5}{2}$
C) (a) Expression. The simplified form of the expression is: $\frac{14}{3}$
(b) Equation. The solution to the equation is : $\frac{15}{28} x-\frac{5}{2}$
D) (a) Equation. The solution to the equation is: $\frac{14}{3}$
(b) Expression. The simplified form of the expression is: $\frac{15}{28} x-\frac{5}{2}$