3(x+6)=21+9x

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Solution for 3(x+6)=21+9x equation:


Simplifying
3(x + 6) = 21 + 9x

Reorder the terms:
3(6 + x) = 21 + 9x
(6 * 3 + x * 3) = 21 + 9x
(18 + 3x) = 21 + 9x

Solving
18 + 3x = 21 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
18 + 3x + -9x = 21 + 9x + -9x

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

Combine like terms: 9x + -9x = 0
18 + -6x = 21 + 0
18 + -6x = 21

Add '-18' to each side of the equation.
18 + -18 + -6x = 21 + -18

Combine like terms: 18 + -18 = 0
0 + -6x = 21 + -18
-6x = 21 + -18

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

Divide each side by '-6'.
x = -0.5

Simplifying
x = -0.5

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