3(7X+7)-9=21X+12

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


Simplifying
3(7X + 7) + -9 = 21X + 12

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

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

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

Reorder the terms:
12 + 21X = 12 + 21X

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

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

Combine like terms: 12 + -12 = 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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