15x+21=6(2x+2)+3x+9

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Solution for 15x+21=6(2x+2)+3x+9 equation: 


Simplifying
15x + 21 = 6(2x + 2) + 3x + 9

Reorder the terms:
21 + 15x = 6(2x + 2) + 3x + 9

Reorder the terms:
21 + 15x = 6(2 + 2x) + 3x + 9
21 + 15x = (2 * 6 + 2x * 6) + 3x + 9
21 + 15x = (12 + 12x) + 3x + 9

Reorder the terms:
21 + 15x = 12 + 9 + 12x + 3x

Combine like terms: 12 + 9 = 21
21 + 15x = 21 + 12x + 3x

Combine like terms: 12x + 3x = 15x
21 + 15x = 21 + 15x

Add '-21' to each side of the equation.
21 + -21 + 15x = 21 + -21 + 15x

Combine like terms: 21 + -21 = 0
0 + 15x = 21 + -21 + 15x
15x = 21 + -21 + 15x

Combine like terms: 21 + -21 = 0
15x = 0 + 15x
15x = 15x

Add '-15x' to each side of the equation.
15x + -15x = 15x + -15x

Combine like terms: 15x + -15x = 0
0 = 15x + -15x

Combine like terms: 15x + -15x = 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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