(X-4)(x+5)=1

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Solution for (X-4)(x+5)=1 equation:


Simplifying
(X + -4)(x + 5) = 1

Reorder the terms:
(-4 + X)(x + 5) = 1

Reorder the terms:
(-4 + X)(5 + x) = 1

Multiply (-4 + X) * (5 + x)
(-4(5 + x) + X(5 + x)) = 1
((5 * -4 + x * -4) + X(5 + x)) = 1
((-20 + -4x) + X(5 + x)) = 1
(-20 + -4x + (5 * X + x * X)) = 1
(-20 + -4x + (5X + xX)) = 1

Reorder the terms:
(-20 + 5X + -4x + xX) = 1
(-20 + 5X + -4x + xX) = 1

Solving
-20 + 5X + -4x + xX = 1

Solving for variable 'X'.

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

Add '20' to each side of the equation.
-20 + 5X + -4x + 20 + xX = 1 + 20

Reorder the terms:
-20 + 20 + 5X + -4x + xX = 1 + 20

Combine like terms: -20 + 20 = 0
0 + 5X + -4x + xX = 1 + 20
5X + -4x + xX = 1 + 20

Combine like terms: 1 + 20 = 21
5X + -4x + xX = 21

Add '4x' to each side of the equation.
5X + -4x + 4x + xX = 21 + 4x

Combine like terms: -4x + 4x = 0
5X + 0 + xX = 21 + 4x
5X + xX = 21 + 4x

Reorder the terms:
-21 + 5X + -4x + xX = 21 + 4x + -21 + -4x

Reorder the terms:
-21 + 5X + -4x + xX = 21 + -21 + 4x + -4x

Combine like terms: 21 + -21 = 0
-21 + 5X + -4x + xX = 0 + 4x + -4x
-21 + 5X + -4x + xX = 4x + -4x

Combine like terms: 4x + -4x = 0
-21 + 5X + -4x + xX = 0

The solution to this equation could not be determined.

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