400=300+250x-550x

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Solution for 400=300+250x-550x equation:


Simplifying
400 = 300 + 250x + -550x

Combine like terms: 250x + -550x = -300x
400 = 300 + -300x

Solving
400 = 300 + -300x

Solving for variable 'x'.

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

Add '300x' to each side of the equation.
400 + 300x = 300 + -300x + 300x

Combine like terms: -300x + 300x = 0
400 + 300x = 300 + 0
400 + 300x = 300

Add '-400' to each side of the equation.
400 + -400 + 300x = 300 + -400

Combine like terms: 400 + -400 = 0
0 + 300x = 300 + -400
300x = 300 + -400

Combine like terms: 300 + -400 = -100
300x = -100

Divide each side by '300'.
x = -0.3333333333

Simplifying
x = -0.3333333333

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