Answer
a.no
b. no
Work Step by Step
To find out if an ordered pair is a solution you need to insert the values of the variables into the equation. If the answer of the system is true, the pair is a solution, if not it isn't.
a. $-2=-2-6\times0<=>-2=-2$
$6\times-2-0=13<=>-12\ne13$
b.$-2=\frac{1}{2}-7\times\frac{5}{14}<=>-2=-2$
$6\times\frac{1}{2}-\frac{5}{14}=13<=>\frac{37}{14}
\ne13$
