30+x-9=10

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Solution for 30+x-9=10 equation: 


Simplifying
30 + x + -9 = 10

Reorder the terms:
30 + -9 + x = 10

Combine like terms: 30 + -9 = 21
21 + x = 10

Solving
21 + x = 10

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 = 10 + -21

Combine like terms: 21 + -21 = 0
0 + x = 10 + -21
x = 10 + -21

Combine like terms: 10 + -21 = -11
x = -11

Simplifying
x = -11

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