6x-9+3x=54

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Solution for 6x-9+3x=54 equation: 


Simplifying
6x + -9 + 3x = 54

Reorder the terms:
-9 + 6x + 3x = 54

Combine like terms: 6x + 3x = 9x
-9 + 9x = 54

Solving
-9 + 9x = 54

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 + 9x = 54 + 9

Combine like terms: -9 + 9 = 0
0 + 9x = 54 + 9
9x = 54 + 9

Combine like terms: 54 + 9 = 63
9x = 63

Divide each side by '9'.
x = 7

Simplifying
x = 7

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