Solve the Formula $V = 6 ( r - 1 ) b$

Multiple Choice

Solve the formula $V = 6 ( r - 1 ) b$ for the variable $r$ .

A) $r = \frac { 6 \mathrm {~V} } { b } - 1$
B) $r = \frac { V + 1 } { 6 b }$
C) $= \frac { V } { 6 b } - 1$
D) $r = \frac { 6 \mathrm {~V} } { b } + 1$
E) $r = \frac { V } { 6 b } + 1$