15x+21=4(3x+6)+3x-3

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Solution for 15x+21=4(3x+6)+3x-3 equation: 


Simplifying
15x + 21 = 4(3x + 6) + 3x + -3

Reorder the terms:
21 + 15x = 4(3x + 6) + 3x + -3

Reorder the terms:
21 + 15x = 4(6 + 3x) + 3x + -3
21 + 15x = (6 * 4 + 3x * 4) + 3x + -3
21 + 15x = (24 + 12x) + 3x + -3

Reorder the terms:
21 + 15x = 24 + -3 + 12x + 3x

Combine like terms: 24 + -3 = 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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