Solve the System by Substitution $5 x+y=30$ $-x+y=-12$ A) $\{(7,-5)\}$ B) $\{(-7,5)\}$ C) $\{(-5,7)\}$

Multiple Choice

Solve the system by substitution. If the system is inconsistent or has dependent equations, say so.
- $5 x+y=30$
$-x+y=-12$

A) $\{(7,-5) \}$
B) $\{(-7,5) \}$
C) $\{(-5,7) \}$
D) $\{(5,-7) \}$