3x(5x+4)-2(5x+4)=

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Solution for 3x(5x+4)-2(5x+4)= equation: 


Simplifying
3x(5x + 4) + -2(5x + 4) = 0

Reorder the terms:
3x(4 + 5x) + -2(5x + 4) = 0
(4 * 3x + 5x * 3x) + -2(5x + 4) = 0
(12x + 15x2) + -2(5x + 4) = 0

Reorder the terms:
12x + 15x2 + -2(4 + 5x) = 0
12x + 15x2 + (4 * -2 + 5x * -2) = 0
12x + 15x2 + (-8 + -10x) = 0

Reorder the terms:
-8 + 12x + -10x + 15x2 = 0

Combine like terms: 12x + -10x = 2x
-8 + 2x + 15x2 = 0

Solving
-8 + 2x + 15x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-4 + -5x)(2 + -3x) = 0


Subproblem 1
Set the factor '(-4 + -5x)' equal to zero and attempt to solve:

Simplifying
-4 + -5x = 0

Solving
-4 + -5x = 0

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

Add '4' to each side of the equation.
-4 + 4 + -5x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -5x = 0 + 4
-5x = 0 + 4

Combine like terms: 0 + 4 = 4
-5x = 4

Divide each side by '-5'.
x = -0.8

Simplifying
x = -0.8

Subproblem 2
Set the factor '(2 + -3x)' equal to zero and attempt to solve:

Simplifying
2 + -3x = 0

Solving
2 + -3x = 0

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

Add '-2' to each side of the equation.
2 + -2 + -3x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -3x = 0 + -2
-3x = 0 + -2

Combine like terms: 0 + -2 = -2
-3x = -2

Divide each side by '-3'.
x = 0.6666666667

Simplifying
x = 0.6666666667
Solution
x = {-0.8, 0.6666666667}

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