9+x=30

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Solution for 9+x=30 equation: 


Simplifying
9 + x = 30

Solving
9 + x = 30

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 + x = 30 + -9

Combine like terms: 9 + -9 = 0
0 + x = 30 + -9
x = 30 + -9

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

Simplifying
x = 21

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