6x+9=21-9

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


Simplifying
6x + 9 = 21 + -9

Reorder the terms:
9 + 6x = 21 + -9

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

Solving
9 + 6x = 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 + -9 + 6x = 12 + -9

Combine like terms: 9 + -9 = 0
0 + 6x = 12 + -9
6x = 12 + -9

Combine like terms: 12 + -9 = 3
6x = 3

Divide each side by '6'.
x = 0.5

Simplifying
x = 0.5

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