9+9x=21+6x

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


Simplifying
9 + 9x = 21 + 6x

Solving
9 + 9x = 21 + 6x

Solving for variable 'x'.

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

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

Combine like terms: 9x + -6x = 3x
9 + 3x = 21 + 6x + -6x

Combine like terms: 6x + -6x = 0
9 + 3x = 21 + 0
9 + 3x = 21

Add '-9' to each side of the equation.
9 + -9 + 3x = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 3x = 21 + -9
3x = 21 + -9

Combine like terms: 21 + -9 = 12
3x = 12

Divide each side by '3'.
x = 4

Simplifying
x = 4

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