400=80-2x

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Solution for 400=80-2x equation:


Simplifying
400 = 80 + -2x

Solving
400 = 80 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
400 + 2x = 80 + -2x + 2x

Combine like terms: -2x + 2x = 0
400 + 2x = 80 + 0
400 + 2x = 80

Add '-400' to each side of the equation.
400 + -400 + 2x = 80 + -400

Combine like terms: 400 + -400 = 0
0 + 2x = 80 + -400
2x = 80 + -400

Combine like terms: 80 + -400 = -320
2x = -320

Divide each side by '2'.
x = -160

Simplifying
x = -160

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