3(7x-3)=21x-9

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


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

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

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

Add '9' to each side of the equation.
-9 + 9 + 21x = -9 + 9 + 21x

Combine like terms: -9 + 9 = 0
0 + 21x = -9 + 9 + 21x
21x = -9 + 9 + 21x

Combine like terms: -9 + 9 = 0
21x = 0 + 21x
21x = 21x

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

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

Combine like terms: 21x + -21x = 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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