3(x+8)=21

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Solution for 3(x+8)=21 equation: 


Simplifying
3(x + 8) = 21

Reorder the terms:
3(8 + x) = 21
(8 * 3 + x * 3) = 21
(24 + 3x) = 21

Solving
24 + 3x = 21

Solving for variable 'x'.

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

Add '-24' to each side of the equation.
24 + -24 + 3x = 21 + -24

Combine like terms: 24 + -24 = 0
0 + 3x = 21 + -24
3x = 21 + -24

Combine like terms: 21 + -24 = -3
3x = -3

Divide each side by '3'.
x = -1

Simplifying
x = -1

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