3(x+7)-21=

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


Simplifying
3(x + 7) + -21 = 0

Reorder the terms:
3(7 + x) + -21 = 0
(7 * 3 + x * 3) + -21 = 0
(21 + 3x) + -21 = 0

Reorder the terms:
21 + -21 + 3x = 0

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

Solving
3x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '3'.
x = 0

Simplifying
x = 0

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