3(4x+7)=21x+9-9x+12

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Solution for 3(4x+7)=21x+9-9x+12 equation: 


Simplifying
3(4x + 7) = 21x + 9 + -9x + 12

Reorder the terms:
3(7 + 4x) = 21x + 9 + -9x + 12
(7 * 3 + 4x * 3) = 21x + 9 + -9x + 12
(21 + 12x) = 21x + 9 + -9x + 12

Reorder the terms:
21 + 12x = 9 + 12 + 21x + -9x

Combine like terms: 9 + 12 = 21
21 + 12x = 21 + 21x + -9x

Combine like terms: 21x + -9x = 12x
21 + 12x = 21 + 12x

Add '-21' to each side of the equation.
21 + -21 + 12x = 21 + -21 + 12x

Combine like terms: 21 + -21 = 0
0 + 12x = 21 + -21 + 12x
12x = 21 + -21 + 12x

Combine like terms: 21 + -21 = 0
12x = 0 + 12x
12x = 12x

Add '-12x' to each side of the equation.
12x + -12x = 12x + -12x

Combine like terms: 12x + -12x = 0
0 = 12x + -12x

Combine like terms: 12x + -12x = 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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