12x-9=30x

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Solution for 12x-9=30x equation:


Simplifying
12x + -9 = 30x

Reorder the terms:
-9 + 12x = 30x

Solving
-9 + 12x = 30x

Solving for variable 'x'.

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

Add '-30x' to each side of the equation.
-9 + 12x + -30x = 30x + -30x

Combine like terms: 12x + -30x = -18x
-9 + -18x = 30x + -30x

Combine like terms: 30x + -30x = 0
-9 + -18x = 0

Add '9' to each side of the equation.
-9 + 9 + -18x = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -18x = 0 + 9
-18x = 0 + 9

Combine like terms: 0 + 9 = 9
-18x = 9

Divide each side by '-18'.
x = -0.5

Simplifying
x = -0.5

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