400-20x=300

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Solution for 400-20x=300 equation: 


Simplifying
400 + -20x = 300

Solving
400 + -20x = 300

Solving for variable 'x'.

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

Add '-400' to each side of the equation.
400 + -400 + -20x = 300 + -400

Combine like terms: 400 + -400 = 0
0 + -20x = 300 + -400
-20x = 300 + -400

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

Divide each side by '-20'.
x = 5

Simplifying
x = 5

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