3(x+7)+6x=9x-21

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Solution for 3(x+7)+6x=9x-21 equation: 


Simplifying
3(x + 7) + 6x = 9x + -21

Reorder the terms:
3(7 + x) + 6x = 9x + -21
(7 * 3 + x * 3) + 6x = 9x + -21
(21 + 3x) + 6x = 9x + -21

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

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

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

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

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

Solving
21 = -21

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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