400=-20w

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Solution for 400=-20w equation:


Simplifying
400 = -20w

Solving
400 = -20w

Solving for variable 'w'.

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

Add '20w' to each side of the equation.
400 + 20w = -20w + 20w

Combine like terms: -20w + 20w = 0
400 + 20w = 0

Add '-400' to each side of the equation.
400 + -400 + 20w = 0 + -400

Combine like terms: 400 + -400 = 0
0 + 20w = 0 + -400
20w = 0 + -400

Combine like terms: 0 + -400 = -400
20w = -400

Divide each side by '20'.
w = -20

Simplifying
w = -20

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