-90=20X-80

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Solution for -90=20X-80 equation: 


Simplifying
-90 = 20X + -80

Reorder the terms:
-90 = -80 + 20X

Solving
-90 = -80 + 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.
-90 + -20X = -80 + 20X + -20X

Combine like terms: 20X + -20X = 0
-90 + -20X = -80 + 0
-90 + -20X = -80

Add '90' to each side of the equation.
-90 + 90 + -20X = -80 + 90

Combine like terms: -90 + 90 = 0
0 + -20X = -80 + 90
-20X = -80 + 90

Combine like terms: -80 + 90 = 10
-20X = 10

Divide each side by '-20'.
X = -0.5

Simplifying
X = -0.5

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