Question

system by substitution.
$7x - 3y = 8$
$y = 3x$

Explanation:

Step1: Substitute $y=3x$ into first equation

$7x - 3(3x) = 8$

Step2: Simplify the equation

$7x - 9x = 8$
$-2x = 8$

Step3: Solve for $x$

$x = \frac{8}{-2} = -4$

Step4: Substitute $x=-4$ into $y=3x$

$y = 3(-4) = -12$

Answer:

$x=-4$, $y=-12$