30=9+x

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Solution for 30=9+x equation:


Simplifying
30 = 9 + x

Solving
30 = 9 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
30 + -1x = 9 + x + -1x

Combine like terms: x + -1x = 0
30 + -1x = 9 + 0
30 + -1x = 9

Add '-30' to each side of the equation.
30 + -30 + -1x = 9 + -30

Combine like terms: 30 + -30 = 0
0 + -1x = 9 + -30
-1x = 9 + -30

Combine like terms: 9 + -30 = -21
-1x = -21

Divide each side by '-1'.
x = 21

Simplifying
x = 21

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