3(4x+8)=9x-21

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Solution for 3(4x+8)=9x-21 equation:


Simplifying
3(4x + 8) = 9x + -21

Reorder the terms:
3(8 + 4x) = 9x + -21
(8 * 3 + 4x * 3) = 9x + -21
(24 + 12x) = 9x + -21

Reorder the terms:
24 + 12x = -21 + 9x

Solving
24 + 12x = -21 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
24 + 12x + -9x = -21 + 9x + -9x

Combine like terms: 12x + -9x = 3x
24 + 3x = -21 + 9x + -9x

Combine like terms: 9x + -9x = 0
24 + 3x = -21 + 0
24 + 3x = -21

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 = -45
3x = -45

Divide each side by '3'.
x = -15

Simplifying
x = -15

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