Question

find the y - value when x = 12 for this equation: x + 3y = 36. what did you just find? x + 3y = 36 12 + 3y = 36 y = 8 when x = 12, y must equal to make the equation true.

Explanation:

Step1: Substitute x=12 into equation

$12 + 3y = 36$

Step2: Isolate the term with y

$3y = 36 - 12$
$3y = 24$

Step3: Solve for y

$y = \frac{24}{3}$

Answer:

When $x = 12$, $y$ must equal 8 to make the equation true. What was found is the y-coordinate of the point on the line $x+3y=36$ where the x-coordinate is 12.