3x-3+3x-3=21

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


Simplifying
3x + -3 + 3x + -3 = 21

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

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

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

Solving
-6 + 6x = 21

Solving for variable 'x'.

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

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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