X-8x-9=12

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Solution for X-8x-9=12 equation:


Simplifying
X + -8x + -9 = 12

Reorder the terms:
-9 + X + -8x = 12

Solving
-9 + X + -8x = 12

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 + X + 9 + -8x = 12 + 9

Reorder the terms:
-9 + 9 + X + -8x = 12 + 9

Combine like terms: -9 + 9 = 0
0 + X + -8x = 12 + 9
X + -8x = 12 + 9

Combine like terms: 12 + 9 = 21
X + -8x = 21

Add '8x' to each side of the equation.
X + -8x + 8x = 21 + 8x

Combine like terms: -8x + 8x = 0
X + 0 = 21 + 8x
X = 21 + 8x

Simplifying
X = 21 + 8x

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