3(x+21)=

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Solution for 3(x+21)= equation: 


Simplifying
3(x + 21) = 0

Reorder the terms:
3(21 + x) = 0
(21 * 3 + x * 3) = 0
(63 + 3x) = 0

Solving
63 + 3x = 0

Solving for variable 'x'.

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

Add '-63' to each side of the equation.
63 + -63 + 3x = 0 + -63

Combine like terms: 63 + -63 = 0
0 + 3x = 0 + -63
3x = 0 + -63

Combine like terms: 0 + -63 = -63
3x = -63

Divide each side by '3'.
x = -21

Simplifying
x = -21

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