7(x+3)-4x=-2x+9x+21-4x

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Solution for 7(x+3)-4x=-2x+9x+21-4x equation: 


Simplifying
7(x + 3) + -4x = -2x + 9x + 21 + -4x

Reorder the terms:
7(3 + x) + -4x = -2x + 9x + 21 + -4x
(3 * 7 + x * 7) + -4x = -2x + 9x + 21 + -4x
(21 + 7x) + -4x = -2x + 9x + 21 + -4x

Combine like terms: 7x + -4x = 3x
21 + 3x = -2x + 9x + 21 + -4x

Reorder the terms:
21 + 3x = 21 + -2x + 9x + -4x

Combine like terms: -2x + 9x = 7x
21 + 3x = 21 + 7x + -4x

Combine like terms: 7x + -4x = 3x
21 + 3x = 21 + 3x

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

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

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

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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