Divide and Simplify $\frac{-12+4 x}{12} \div \frac{21-7 x}{21}$ A) $\frac{x-3}{3-x}$ B) $\frac{x-3}{x+3}$ C) -1
D) 1

Multiple Choice

Divide and simplify.
- $\frac{-12+4 x}{12} \div \frac{21-7 x}{21}$

A) $\frac{x-3}{3-x}$
B) $\frac{x-3}{x+3}$
C) -1
D) 1