Answer
$(-1,3)$ is not a solution of the linear system.
Work Step by Step
The given system of linear equations.
$y=-7x-4$ ...... (1)
$y=8x+5$ ...... (2)
The given solution is $(-1,3)$.
Substitute $-1$ for $x$ and $3$ for $y$ in each equation.
Equation 1:
$\Rightarrow y=-7x-4$
$\Rightarrow 3=-7(-1)-4$
$\Rightarrow 3=7-4$
$\Rightarrow 3=3$
True.
Equation 2:
$\Rightarrow y=8x+5$
$\Rightarrow 3=8(-1)+5$
$\Rightarrow 3=-8+5$
$\Rightarrow 3=-3$
False.
Hence, $(-1,3)$ is not a solution of the linear system.
