400-3x=x

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Solution for 400-3x=x equation:


Simplifying
400 + -3x = x

Solving
400 + -3x = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
400 + -3x + -1x = x + -1x

Combine like terms: -3x + -1x = -4x
400 + -4x = x + -1x

Combine like terms: x + -1x = 0
400 + -4x = 0

Add '-400' to each side of the equation.
400 + -400 + -4x = 0 + -400

Combine like terms: 400 + -400 = 0
0 + -4x = 0 + -400
-4x = 0 + -400

Combine like terms: 0 + -400 = -400
-4x = -400

Divide each side by '-4'.
x = 100

Simplifying
x = 100

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