30-x=30

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Solution for 30-x=30 equation: 


Simplifying
30 + -1x = 30

Add '-30' to each side of the equation.
30 + -30 + -1x = 30 + -30

Combine like terms: 30 + -30 = 0
0 + -1x = 30 + -30
-1x = 30 + -30

Combine like terms: 30 + -30 = 0
-1x = 0

Solving
-1x = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
x = 0

Simplifying
x = 0

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