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

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


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

Reorder the terms:
6(7 + x) + -3(x + 7) = 3x + 21
(7 * 6 + x * 6) + -3(x + 7) = 3x + 21
(42 + 6x) + -3(x + 7) = 3x + 21

Reorder the terms:
42 + 6x + -3(7 + x) = 3x + 21
42 + 6x + (7 * -3 + x * -3) = 3x + 21
42 + 6x + (-21 + -3x) = 3x + 21

Reorder the terms:
42 + -21 + 6x + -3x = 3x + 21

Combine like terms: 42 + -21 = 21
21 + 6x + -3x = 3x + 21

Combine like terms: 6x + -3x = 3x
21 + 3x = 3x + 21

Reorder the terms:
21 + 3x = 21 + 3x

Add '-21' to each side of the equation.
21 + -21 + 3x = 21 + -21 + 3x

Combine like terms: 21 + -21 = 0
0 + 3x = 21 + -21 + 3x
3x = 21 + -21 + 3x

Combine like terms: 21 + -21 = 0
3x = 0 + 3x
3x = 3x

Add '-3x' to each side of the equation.
3x + -3x = 3x + -3x

Combine like terms: 3x + -3x = 0
0 = 3x + -3x

Combine like terms: 3x + -3x = 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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