6x-3(x+2)=21

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Solution for 6x-3(x+2)=21 equation:


Simplifying
6x + -3(x + 2) = 21

Reorder the terms:
6x + -3(2 + x) = 21
6x + (2 * -3 + x * -3) = 21
6x + (-6 + -3x) = 21

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

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

Solving
-6 + 3x = 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 + 3x = 21 + 6

Combine like terms: -6 + 6 = 0
0 + 3x = 21 + 6
3x = 21 + 6

Combine like terms: 21 + 6 = 27
3x = 27

Divide each side by '3'.
x = 9

Simplifying
x = 9

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