(4+x)(3x+5)=0

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Solution for (4+x)(3x+5)=0 equation: 


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

Reorder the terms:
(4 + x)(5 + 3x) = 0

Multiply (4 + x) * (5 + 3x)
(4(5 + 3x) + x(5 + 3x)) = 0
((5 * 4 + 3x * 4) + x(5 + 3x)) = 0
((20 + 12x) + x(5 + 3x)) = 0
(20 + 12x + (5 * x + 3x * x)) = 0
(20 + 12x + (5x + 3x2)) = 0

Combine like terms: 12x + 5x = 17x
(20 + 17x + 3x2) = 0

Solving
20 + 17x + 3x2 = 0

Solving for variable 'x'.

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


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

Simplifying
4 + x = 0

Solving
4 + x = 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 + x = 0 + -4

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

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

Simplifying
x = -4

Subproblem 2
Set the factor '(5 + 3x)' equal to zero and attempt to solve:

Simplifying
5 + 3x = 0

Solving
5 + 3x = 0

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

Add '-5' to each side of the equation.
5 + -5 + 3x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 3x = 0 + -5
3x = 0 + -5

Combine like terms: 0 + -5 = -5
3x = -5

Divide each side by '3'.
x = -1.666666667

Simplifying
x = -1.666666667
Solution
x = {-4, -1.666666667}

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