(X+3)(x+5)=21

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Solution for (X+3)(x+5)=21 equation:


Simplifying
(X + 3)(x + 5) = 21

Reorder the terms:
(3 + X)(x + 5) = 21

Reorder the terms:
(3 + X)(5 + x) = 21

Multiply (3 + X) * (5 + x)
(3(5 + x) + X(5 + x)) = 21
((5 * 3 + x * 3) + X(5 + x)) = 21
((15 + 3x) + X(5 + x)) = 21
(15 + 3x + (5 * X + x * X)) = 21
(15 + 3x + (5X + xX)) = 21

Reorder the terms:
(15 + 5X + 3x + xX) = 21
(15 + 5X + 3x + xX) = 21

Solving
15 + 5X + 3x + xX = 21

Solving for variable 'X'.

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

Add '-15' to each side of the equation.
15 + 5X + 3x + -15 + xX = 21 + -15

Reorder the terms:
15 + -15 + 5X + 3x + xX = 21 + -15

Combine like terms: 15 + -15 = 0
0 + 5X + 3x + xX = 21 + -15
5X + 3x + xX = 21 + -15

Combine like terms: 21 + -15 = 6
5X + 3x + xX = 6

Add '-3x' to each side of the equation.
5X + 3x + -3x + xX = 6 + -3x

Combine like terms: 3x + -3x = 0
5X + 0 + xX = 6 + -3x
5X + xX = 6 + -3x

Reorder the terms:
-6 + 5X + 3x + xX = 6 + -3x + -6 + 3x

Reorder the terms:
-6 + 5X + 3x + xX = 6 + -6 + -3x + 3x

Combine like terms: 6 + -6 = 0
-6 + 5X + 3x + xX = 0 + -3x + 3x
-6 + 5X + 3x + xX = -3x + 3x

Combine like terms: -3x + 3x = 0
-6 + 5X + 3x + xX = 0

The solution to this equation could not be determined.

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