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

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


Simplifying
21 + x = 3(9 + -1x) + -6
21 + x = (9 * 3 + -1x * 3) + -6
21 + x = (27 + -3x) + -6

Reorder the terms:
21 + x = 27 + -6 + -3x

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

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

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

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

Solving
x = -3x

Solving for variable 'x'.

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

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

Combine like terms: x + 3x = 4x
4x = -3x + 3x

Combine like terms: -3x + 3x = 0
4x = 0

Divide each side by '4'.
x = 0

Simplifying
x = 0

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