280=-x+1

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Solution for 280=-x+1 equation:


Simplifying
280 = -1x + 1

Reorder the terms:
280 = 1 + -1x

Solving
280 = 1 + -1x

Solving for variable 'x'.

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

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

Combine like terms: -1x + x = 0
280 + x = 1 + 0
280 + x = 1

Add '-280' to each side of the equation.
280 + -280 + x = 1 + -280

Combine like terms: 280 + -280 = 0
0 + x = 1 + -280
x = 1 + -280

Combine like terms: 1 + -280 = -279
x = -279

Simplifying
x = -279

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