-400=-100-20x

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Solution for -400=-100-20x equation:


Simplifying
-400 = -100 + -20x

Solving
-400 = -100 + -20x

Solving for variable 'x'.

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

Add '20x' to each side of the equation.
-400 + 20x = -100 + -20x + 20x

Combine like terms: -20x + 20x = 0
-400 + 20x = -100 + 0
-400 + 20x = -100

Add '400' to each side of the equation.
-400 + 400 + 20x = -100 + 400

Combine like terms: -400 + 400 = 0
0 + 20x = -100 + 400
20x = -100 + 400

Combine like terms: -100 + 400 = 300
20x = 300

Divide each side by '20'.
x = 15

Simplifying
x = 15

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