(x+3)(5x-1)=0

Solution for (x+3)(5x-1)=0 equation:

Simplifying
(x + 3)(5x + -1) = 0

Reorder the terms:
(3 + x)(5x + -1) = 0

Reorder the terms:
(3 + x)(-1 + 5x) = 0

Multiply (3 + x) * (-1 + 5x)
(3(-1 + 5x) + x(-1 + 5x)) = 0
((-1 * 3 + 5x * 3) + x(-1 + 5x)) = 0
((-3 + 15x) + x(-1 + 5x)) = 0
(-3 + 15x + (-1 * x + 5x * x)) = 0
(-3 + 15x + (-1x + 5x2)) = 0

Combine like terms: 15x + -1x = 14x
(-3 + 14x + 5x2) = 0

Solving
-3 + 14x + 5x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-3 + -1x)(1 + -5x) = 0

Subproblem 1
Set the factor '(-3 + -1x)' equal to zero and attempt to solve:

Simplifying
-3 + -1x = 0

Solving
-3 + -1x = 0

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

Add '3' to each side of the equation.
-3 + 3 + -1x = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1x = 0 + 3
-1x = 0 + 3

Combine like terms: 0 + 3 = 3
-1x = 3

Divide each side by '-1'.
x = -3

Simplifying
x = -3
Subproblem 2
Set the factor '(1 + -5x)' equal to zero and attempt to solve:

Simplifying
1 + -5x = 0

Solving
1 + -5x = 0

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

Add '-1' to each side of the equation.
1 + -1 + -5x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -5x = 0 + -1
-5x = 0 + -1

Combine like terms: 0 + -1 = -1
-5x = -1

Divide each side by '-5'.
x = 0.2

Simplifying
x = 0.2
Solution
x = {-3, 0.2}