21-2x=9-8x

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Solution for 21-2x=9-8x equation:


Simplifying
21 + -2x = 9 + -8x

Solving
21 + -2x = 9 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
21 + -2x + 8x = 9 + -8x + 8x

Combine like terms: -2x + 8x = 6x
21 + 6x = 9 + -8x + 8x

Combine like terms: -8x + 8x = 0
21 + 6x = 9 + 0
21 + 6x = 9

Add '-21' to each side of the equation.
21 + -21 + 6x = 9 + -21

Combine like terms: 21 + -21 = 0
0 + 6x = 9 + -21
6x = 9 + -21

Combine like terms: 9 + -21 = -12
6x = -12

Divide each side by '6'.
x = -2

Simplifying
x = -2

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