Solve the System by the Substitution Method $x^{2}+y^{2}=85$ $\mathrm{x}-\mathrm{y}=1$ A) $\{(-6,-7),(7,6)\}$ B) $\{(-6,7),(-7,6)\}$

Multiple Choice

Solve the system by the substitution method.
- $x^{2}+y^{2}=85$
$\mathrm{x}-\mathrm{y}=1$

A) $\{(-6,-7) ,(7,6) \}$
B) $\{(-6,7) ,(-7,6) \}$
C) $\{(6,-7) ,(7,-6) \}$
D) $\{(6,7) ,(7,6) \}$