(x+7)(x+3)=x+10x+21

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Solution for (x+7)(x+3)=x+10x+21 equation:


Simplifying
(x + 7)(x + 3) = x + 10x + 21

Reorder the terms:
(7 + x)(x + 3) = x + 10x + 21

Reorder the terms:
(7 + x)(3 + x) = x + 10x + 21

Multiply (7 + x) * (3 + x)
(7(3 + x) + x(3 + x)) = x + 10x + 21
((3 * 7 + x * 7) + x(3 + x)) = x + 10x + 21
((21 + 7x) + x(3 + x)) = x + 10x + 21
(21 + 7x + (3 * x + x * x)) = x + 10x + 21
(21 + 7x + (3x + x2)) = x + 10x + 21

Combine like terms: 7x + 3x = 10x
(21 + 10x + x2) = x + 10x + 21

Reorder the terms:
21 + 10x + x2 = 21 + x + 10x

Combine like terms: x + 10x = 11x
21 + 10x + x2 = 21 + 11x

Add '-21' to each side of the equation.
21 + 10x + -21 + x2 = 21 + -21 + 11x

Reorder the terms:
21 + -21 + 10x + x2 = 21 + -21 + 11x

Combine like terms: 21 + -21 = 0
0 + 10x + x2 = 21 + -21 + 11x
10x + x2 = 21 + -21 + 11x

Combine like terms: 21 + -21 = 0
10x + x2 = 0 + 11x
10x + x2 = 11x

Solving
10x + x2 = 11x

Solving for variable 'x'.

Reorder the terms:
10x + -11x + x2 = 11x + -11x

Combine like terms: 10x + -11x = -1x
-1x + x2 = 11x + -11x

Combine like terms: 11x + -11x = 0
-1x + x2 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(-1 + x) = 0

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(-1 + x)' equal to zero and attempt to solve: Simplifying -1 + x = 0 Solving -1 + x = 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 + x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + x = 0 + 1 x = 0 + 1 Combine like terms: 0 + 1 = 1 x = 1 Simplifying x = 1

Solution

x = {0, 1}

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