-3(7x-3)+6=-21x+15

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Solution for -3(7x-3)+6=-21x+15 equation: 


Simplifying
-3(7x + -3) + 6 = -21x + 15

Reorder the terms:
-3(-3 + 7x) + 6 = -21x + 15
(-3 * -3 + 7x * -3) + 6 = -21x + 15
(9 + -21x) + 6 = -21x + 15

Reorder the terms:
9 + 6 + -21x = -21x + 15

Combine like terms: 9 + 6 = 15
15 + -21x = -21x + 15

Reorder the terms:
15 + -21x = 15 + -21x

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

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

Combine like terms: 15 + -15 = 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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