285=78-x

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Solution for 285=78-x equation:


Simplifying
285 = 78 + -1x

Solving
285 = 78 + -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.
285 + x = 78 + -1x + x

Combine like terms: -1x + x = 0
285 + x = 78 + 0
285 + x = 78

Add '-285' to each side of the equation.
285 + -285 + x = 78 + -285

Combine like terms: 285 + -285 = 0
0 + x = 78 + -285
x = 78 + -285

Combine like terms: 78 + -285 = -207
x = -207

Simplifying
x = -207

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