9x-21=3+3

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


Simplifying
9x + -21 = 3 + 3

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

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

Solving
-21 + 9x = 6

Solving for variable 'x'.

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

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

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

Combine like terms: 6 + 21 = 27
9x = 27

Divide each side by '9'.
x = 3

Simplifying
x = 3

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