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Select all of the equations below that are equivalent to:$\newline$$-21 = f - g$$\newline$Use properties of equality.$\newline$$\newline$Multi-select Choices:$\newline$(A) $5 = \frac{f - g}{-3}$$\newline$(B) $-7 = \frac{f - g}{3}$$\newline$(C) $3 = \frac{f - g}{-7}$$\newline$(D) $-4 = \frac{f - g}{7}$