Question

4x+y=12

Answer 1

Slope Intercept

y = -4x + 12

Slope = -4
y-Intercept = (0,12)

What else?

Answer 2

What we have right now : Is 4x +y = 12
The slope intercept is : -4
and the intercept is y it's equal to : (0,12)

Simplify:
4x + -1y = 12

Solve
4x + -1y = 12

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add 'y' to each side of the equation.
4x + -1y + y = 12 + y

Combine like terms: -1y + y = 0
4x + 0 = 12 + y
4x = 12 + y

Divide each side by '4'.
x = 3 + 0.25y

Simplify
x = 3 + 0.25y

Hope that helped!