x=25-40-x

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Solution for x=25-40-x equation: 


Simplifying
x = 25 + -40 + -1x

Combine like terms: 25 + -40 = -15
x = -15 + -1x

Solving
x = -15 + -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.
x + x = -15 + -1x + x

Combine like terms: x + x = 2x
2x = -15 + -1x + x

Combine like terms: -1x + x = 0
2x = -15 + 0
2x = -15

Divide each side by '2'.
x = -7.5

Simplifying
x = -7.5

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