-x+9=20

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Solution for -x+9=20 equation: 


Simplifying
-1x + 9 = 20

Reorder the terms:
9 + -1x = 20

Solving
9 + -1x = 20

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + -1x = 20 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = 20 + -9
-1x = 20 + -9

Combine like terms: 20 + -9 = 11
-1x = 11

Divide each side by '-1'.
x = -11

Simplifying
x = -11

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