-80=x-100

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Solution for -80=x-100 equation:


Simplifying
-80 = x + -100

Reorder the terms:
-80 = -100 + x

Solving
-80 = -100 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-80 + -1x = -100 + x + -1x

Combine like terms: x + -1x = 0
-80 + -1x = -100 + 0
-80 + -1x = -100

Add '80' to each side of the equation.
-80 + 80 + -1x = -100 + 80

Combine like terms: -80 + 80 = 0
0 + -1x = -100 + 80
-1x = -100 + 80

Combine like terms: -100 + 80 = -20
-1x = -20

Divide each side by '-1'.
x = 20

Simplifying
x = 20

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