x(x+7)=6x+20

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Solution for x(x+7)=6x+20 equation:


Simplifying
x(x + 7) = 6x + 20

Reorder the terms:
x(7 + x) = 6x + 20
(7 * x + x * x) = 6x + 20
(7x + x2) = 6x + 20

Reorder the terms:
7x + x2 = 20 + 6x

Solving
7x + x2 = 20 + 6x

Solving for variable 'x'.

Reorder the terms:
-20 + 7x + -6x + x2 = 20 + 6x + -20 + -6x

Combine like terms: 7x + -6x = 1x
-20 + 1x + x2 = 20 + 6x + -20 + -6x

Reorder the terms:
-20 + 1x + x2 = 20 + -20 + 6x + -6x

Combine like terms: 20 + -20 = 0
-20 + 1x + x2 = 0 + 6x + -6x
-20 + 1x + x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-20 + 1x + x2 = 0

Factor a trinomial.
(-5 + -1x)(4 + -1x) = 0

Subproblem 1

Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5

Subproblem 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 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 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-5, 4}

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