3x(x-3)-(x+1)(3x+2)=8

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Solution for 3x(x-3)-(x+1)(3x+2)=8 equation:


Simplifying
3x(x + -3) + -1(x + 1)(3x + 2) = 8

Reorder the terms:
3x(-3 + x) + -1(x + 1)(3x + 2) = 8
(-3 * 3x + x * 3x) + -1(x + 1)(3x + 2) = 8
(-9x + 3x2) + -1(x + 1)(3x + 2) = 8

Reorder the terms:
-9x + 3x2 + -1(1 + x)(3x + 2) = 8

Reorder the terms:
-9x + 3x2 + -1(1 + x)(2 + 3x) = 8

Multiply (1 + x) * (2 + 3x)
-9x + 3x2 + -1(1(2 + 3x) + x(2 + 3x)) = 8
-9x + 3x2 + -1((2 * 1 + 3x * 1) + x(2 + 3x)) = 8
-9x + 3x2 + -1((2 + 3x) + x(2 + 3x)) = 8
-9x + 3x2 + -1(2 + 3x + (2 * x + 3x * x)) = 8
-9x + 3x2 + -1(2 + 3x + (2x + 3x2)) = 8

Combine like terms: 3x + 2x = 5x
-9x + 3x2 + -1(2 + 5x + 3x2) = 8
-9x + 3x2 + (2 * -1 + 5x * -1 + 3x2 * -1) = 8
-9x + 3x2 + (-2 + -5x + -3x2) = 8

Reorder the terms:
-2 + -9x + -5x + 3x2 + -3x2 = 8

Combine like terms: -9x + -5x = -14x
-2 + -14x + 3x2 + -3x2 = 8

Combine like terms: 3x2 + -3x2 = 0
-2 + -14x + 0 = 8
-2 + -14x = 8

Solving
-2 + -14x = 8

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + -14x = 8 + 2

Combine like terms: -2 + 2 = 0
0 + -14x = 8 + 2
-14x = 8 + 2

Combine like terms: 8 + 2 = 10
-14x = 10

Divide each side by '-14'.
x = -0.7142857143

Simplifying
x = -0.7142857143

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