9(3x+8)-3(4x+21)=0

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Solution for 9(3x+8)-3(4x+21)=0 equation:


Simplifying
9(3x + 8) + -3(4x + 21) = 0

Reorder the terms:
9(8 + 3x) + -3(4x + 21) = 0
(8 * 9 + 3x * 9) + -3(4x + 21) = 0
(72 + 27x) + -3(4x + 21) = 0

Reorder the terms:
72 + 27x + -3(21 + 4x) = 0
72 + 27x + (21 * -3 + 4x * -3) = 0
72 + 27x + (-63 + -12x) = 0

Reorder the terms:
72 + -63 + 27x + -12x = 0

Combine like terms: 72 + -63 = 9
9 + 27x + -12x = 0

Combine like terms: 27x + -12x = 15x
9 + 15x = 0

Solving
9 + 15x = 0

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 15x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 15x = 0 + -9
15x = 0 + -9

Combine like terms: 0 + -9 = -9
15x = -9

Divide each side by '15'.
x = -0.6

Simplifying
x = -0.6

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