(300+150)-300=-x

Solution for (300+150)-300=-x equation:

Simplifying
(300 + 150) + -300 = -1x

Combine like terms: 300 + 150 = 450
(450) + -300 = -1x
450 + -300 = -1x

Combine like terms: 450 + -300 = 150
150 = -1x

Solving
150 = -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
150 + x = -1x + x

Combine like terms: -1x + x = 0
150 + x = 0

Add '-150' to each side of the equation.
150 + -150 + x = 0 + -150

Combine like terms: 150 + -150 = 0
0 + x = 0 + -150
x = 0 + -150

Combine like terms: 0 + -150 = -150
x = -150

Simplifying
x = -150