20-4x=-40

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Solution for 20-4x=-40 equation: 


Simplifying
20 + -4x = -40

Solving
20 + -4x = -40

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + -4x = -40 + -20

Combine like terms: 20 + -20 = 0
0 + -4x = -40 + -20
-4x = -40 + -20

Combine like terms: -40 + -20 = -60
-4x = -60

Divide each side by '-4'.
x = 15

Simplifying
x = 15

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