Question

solve the system by substitution.
y = 5x
y = -4x + 27

Explanation:

Step1: Substitute $y=5x$ into second equation

$5x = -4x + 27$

Step2: Isolate $x$ terms

$5x + 4x = 27$
$9x = 27$

Step3: Solve for $x$

$x = \frac{27}{9} = 3$

Step4: Find $y$ using $y=5x$

$y = 5\times3 = 15$

Answer:

$x=3$, $y=15$