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

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


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

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

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

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

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

Combine like terms: -21 + 21 = 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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