9-(2-x)=-x

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Solution for 9-(2-x)=-x equation:


Simplifying
9 + -1(2 + -1x) = -1x
9 + (2 * -1 + -1x * -1) = -1x
9 + (-2 + 1x) = -1x

Combine like terms: 9 + -2 = 7
7 + 1x = -1x

Solving
7 + 1x = -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.
7 + 1x + x = -1x + x

Combine like terms: 1x + x = 2x
7 + 2x = -1x + x

Combine like terms: -1x + x = 0
7 + 2x = 0

Add '-7' to each side of the equation.
7 + -7 + 2x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 2x = 0 + -7
2x = 0 + -7

Combine like terms: 0 + -7 = -7
2x = -7

Divide each side by '2'.
x = -3.5

Simplifying
x = -3.5

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