15-9=-x

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Solution for 15-9=-x equation:


Simplifying
15 + -9 = -1x

Combine like terms: 15 + -9 = 6
6 = -1x

Solving
6 = -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.
6 + x = -1x + x

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

Add '-6' to each side of the equation.
6 + -6 + x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + x = 0 + -6
x = 0 + -6

Combine like terms: 0 + -6 = -6
x = -6

Simplifying
x = -6

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