5x+21-x=7(3+x)-3x

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Solution for 5x+21-x=7(3+x)-3x equation:


Simplifying
5x + 21 + -1x = 7(3 + x) + -3x

Reorder the terms:
21 + 5x + -1x = 7(3 + x) + -3x

Combine like terms: 5x + -1x = 4x
21 + 4x = 7(3 + x) + -3x
21 + 4x = (3 * 7 + x * 7) + -3x
21 + 4x = (21 + 7x) + -3x

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

Add '-21' to each side of the equation.
21 + -21 + 4x = 21 + -21 + 4x

Combine like terms: 21 + -21 = 0
0 + 4x = 21 + -21 + 4x
4x = 21 + -21 + 4x

Combine like terms: 21 + -21 = 0
4x = 0 + 4x
4x = 4x

Add '-4x' to each side of the equation.
4x + -4x = 4x + -4x

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

Combine like terms: 4x + -4x = 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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