Solve the Formula $c = \frac { 1 } { 2 } ( B + t ) x$

Multiple Choice

Solve the formula $c = \frac { 1 } { 2 } ( B + t ) x$ for the variable $x$ .

A) $x = \frac { B + t } { 2 c }$
B) $x = \frac { c } { 2 ( B + t ) }$
C) $x = \frac { 2 ( B + t ) } { c }$
D) $x = \frac { 2 c } { B + t }$
E) $\chi = \frac { c } { 2 B + 2 t }$