12x-21=36+9x

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Solution for 12x-21=36+9x equation:


Simplifying
12x + -21 = 36 + 9x

Reorder the terms:
-21 + 12x = 36 + 9x

Solving
-21 + 12x = 36 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
-21 + 12x + -9x = 36 + 9x + -9x

Combine like terms: 12x + -9x = 3x
-21 + 3x = 36 + 9x + -9x

Combine like terms: 9x + -9x = 0
-21 + 3x = 36 + 0
-21 + 3x = 36

Add '21' to each side of the equation.
-21 + 21 + 3x = 36 + 21

Combine like terms: -21 + 21 = 0
0 + 3x = 36 + 21
3x = 36 + 21

Combine like terms: 36 + 21 = 57
3x = 57

Divide each side by '3'.
x = 19

Simplifying
x = 19

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