30-3x=9

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Solution for 30-3x=9 equation: 


Simplifying
30 + -3x = 9

Solving
30 + -3x = 9

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + -3x = 9 + -30

Combine like terms: 30 + -30 = 0
0 + -3x = 9 + -30
-3x = 9 + -30

Combine like terms: 9 + -30 = -21
-3x = -21

Divide each side by '-3'.
x = 7

Simplifying
x = 7

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