6-21=9x-6-8x

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Solution for 6-21=9x-6-8x equation:


Simplifying
6 + -21 = 9x + -6 + -8x

Combine like terms: 6 + -21 = -15
-15 = 9x + -6 + -8x

Reorder the terms:
-15 = -6 + 9x + -8x

Combine like terms: 9x + -8x = 1x
-15 = -6 + 1x

Solving
-15 = -6 + 1x

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.
-15 + -1x = -6 + 1x + -1x

Combine like terms: 1x + -1x = 0
-15 + -1x = -6 + 0
-15 + -1x = -6

Add '15' to each side of the equation.
-15 + 15 + -1x = -6 + 15

Combine like terms: -15 + 15 = 0
0 + -1x = -6 + 15
-1x = -6 + 15

Combine like terms: -6 + 15 = 9
-1x = 9

Divide each side by '-1'.
x = -9

Simplifying
x = -9

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