9x-6=3x+21

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Solution for 9x-6=3x+21 equation:


Simplifying
9x + -6 = 3x + 21

Reorder the terms:
-6 + 9x = 3x + 21

Reorder the terms:
-6 + 9x = 21 + 3x

Solving
-6 + 9x = 21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-6 + 9x + -3x = 21 + 3x + -3x

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

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

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

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

Combine like terms: 21 + 6 = 27
6x = 27

Divide each side by '6'.
x = 4.5

Simplifying
x = 4.5

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