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

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


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

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

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

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

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

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

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

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

Combine like terms: 9x + -9x = 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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