If your equation was x + 4y = 12, then:
x + 4y = 12
→ 4y = -x + 12
← y = -x/4 + 3
If your equation was x = 4y + 12, then:
x = 4y + 12
→ 4y + 12 = x
→ 4y = x - 12
→ y = x/4 - 3
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Unfortunately, the browser used by this site is pretty nearly useless for mathematical questions since it strips out most symbols including the plus and equals symbols. It is therefore not possible to determine exactly what the question is.
It is something like y = +/- 0.25x +/- 3
If you mean: 2y = -4x-12 then y = -2x-6 and -6 is the y intercept
An equation is linear if and only if all of the unknown quantities are multiplied by a constant and added to the rest of the left or right side. In other words, there are no powers, trig, etc. ex. 5x -y = 12 is linear. 3a +4b +5c +19d +pi*f = 0 is linear. sin(x) = 0 is not. x^2 = y-15 is not.
12
23
-5