2x+21=7(x+3)-5x

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Solution for 2x+21=7(x+3)-5x equation: 


Simplifying
2x + 21 = 7(x + 3) + -5x

Reorder the terms:
21 + 2x = 7(x + 3) + -5x

Reorder the terms:
21 + 2x = 7(3 + x) + -5x
21 + 2x = (3 * 7 + x * 7) + -5x
21 + 2x = (21 + 7x) + -5x

Combine like terms: 7x + -5x = 2x
21 + 2x = 21 + 2x

Add '-21' to each side of the equation.
21 + -21 + 2x = 21 + -21 + 2x

Combine like terms: 21 + -21 = 0
0 + 2x = 21 + -21 + 2x
2x = 21 + -21 + 2x

Combine like terms: 21 + -21 = 0
2x = 0 + 2x
2x = 2x

Add '-2x' to each side of the equation.
2x + -2x = 2x + -2x

Combine like terms: 2x + -2x = 0
0 = 2x + -2x

Combine like terms: 2x + -2x = 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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