9-8x=2x-21

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


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

Reorder the terms:
9 + -8x = -21 + 2x

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

Solving for variable 'x'.

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

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

Combine like terms: -8x + -2x = -10x
9 + -10x = -21 + 2x + -2x

Combine like terms: 2x + -2x = 0
9 + -10x = -21 + 0
9 + -10x = -21

Add '-9' to each side of the equation.
9 + -9 + -10x = -21 + -9

Combine like terms: 9 + -9 = 0
0 + -10x = -21 + -9
-10x = -21 + -9

Combine like terms: -21 + -9 = -30
-10x = -30

Divide each side by '-10'.
x = 3

Simplifying
x = 3

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