(4-x)(2x-1)=0

Solution for (4-x)(2x-1)=0 equation:

Simplifying
(4 + -1x)(2x + -1) = 0

Reorder the terms:
(4 + -1x)(-1 + 2x) = 0

Multiply (4 + -1x) * (-1 + 2x)
(4(-1 + 2x) + -1x * (-1 + 2x)) = 0
((-1 * 4 + 2x * 4) + -1x * (-1 + 2x)) = 0
((-4 + 8x) + -1x * (-1 + 2x)) = 0
(-4 + 8x + (-1 * -1x + 2x * -1x)) = 0
(-4 + 8x + (1x + -2x2)) = 0

Combine like terms: 8x + 1x = 9x
(-4 + 9x + -2x2) = 0

Solving
-4 + 9x + -2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-4 + x)(1 + -2x) = 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 '(1 + -2x)' equal to zero and attempt to solve:

Simplifying
1 + -2x = 0

Solving
1 + -2x = 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 + -2x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2x = 0 + -1
-2x = 0 + -1

Combine like terms: 0 + -1 = -1
-2x = -1

Divide each side by '-2'.
x = 0.5

Simplifying
x = 0.5
Solution
x = {4, 0.5}