-21+x=0

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Solution for -21+x=0 equation: 


Simplifying
-21 + x = 0

Solving
-21 + x = 0

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + x = 0 + 21

Combine like terms: -21 + 21 = 0
0 + x = 0 + 21
x = 0 + 21

Combine like terms: 0 + 21 = 21
x = 21

Simplifying
x = 21

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