10=9-x

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Solution for 10=9-x equation:


Simplifying
10 = 9 + -1x

Solving
10 = 9 + -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.
10 + x = 9 + -1x + x

Combine like terms: -1x + x = 0
10 + x = 9 + 0
10 + x = 9

Add '-10' to each side of the equation.
10 + -10 + x = 9 + -10

Combine like terms: 10 + -10 = 0
0 + x = 9 + -10
x = 9 + -10

Combine like terms: 9 + -10 = -1
x = -1

Simplifying
x = -1

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