(-2+y)(-400)+(-300y)=0

Solution for (-2+y)(-400)+(-300y)=0 equation:

Simplifying
(-2 + y)(-400) + (-300y) = 0

Reorder the terms for easier multiplication:
-400(-2 + y) + (-300y) = 0
(-2 * -400 + y * -400) + (-300y) = 0
(800 + -400y) + (-300y) = 0

Combine like terms: -400y + (-300y) = -700y
800 + -700y = 0

Solving
800 + -700y = 0

Solving for variable 'y'.

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

Add '-800' to each side of the equation.
800 + -800 + -700y = 0 + -800

Combine like terms: 800 + -800 = 0
0 + -700y = 0 + -800
-700y = 0 + -800

Combine like terms: 0 + -800 = -800
-700y = -800

Divide each side by '-700'.
y = 1.142857143

Simplifying
y = 1.142857143