6x-9=21-3

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


Simplifying
6x + -9 = 21 + -3

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

Combine like terms: 21 + -3 = 18
-9 + 6x = 18

Solving
-9 + 6x = 18

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 + 6x = 18 + 9

Combine like terms: -9 + 9 = 0
0 + 6x = 18 + 9
6x = 18 + 9

Combine like terms: 18 + 9 = 27
6x = 27

Divide each side by '6'.
x = 4.5

Simplifying
x = 4.5

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