3x-3-21=0

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Solution for 3x-3-21=0 equation: 


Simplifying
3x + -3 + -21 = 0

Reorder the terms:
-3 + -21 + 3x = 0

Combine like terms: -3 + -21 = -24
-24 + 3x = 0

Solving
-24 + 3x = 0

Solving for variable 'x'.

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

Add '24' to each side of the equation.
-24 + 24 + 3x = 0 + 24

Combine like terms: -24 + 24 = 0
0 + 3x = 0 + 24
3x = 0 + 24

Combine like terms: 0 + 24 = 24
3x = 24

Divide each side by '3'.
x = 8

Simplifying
x = 8

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