x(x+3)=2(x+18)+20

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Solution for x(x+3)=2(x+18)+20 equation: 


Simplifying
x(x + 3) = 2(x + 18) + 20

Reorder the terms:
x(3 + x) = 2(x + 18) + 20
(3 * x + x * x) = 2(x + 18) + 20
(3x + x2) = 2(x + 18) + 20

Reorder the terms:
3x + x2 = 2(18 + x) + 20
3x + x2 = (18 * 2 + x * 2) + 20
3x + x2 = (36 + 2x) + 20

Reorder the terms:
3x + x2 = 36 + 20 + 2x

Combine like terms: 36 + 20 = 56
3x + x2 = 56 + 2x

Solving
3x + x2 = 56 + 2x

Solving for variable 'x'.

Reorder the terms:
-56 + 3x + -2x + x2 = 56 + 2x + -56 + -2x

Combine like terms: 3x + -2x = 1x
-56 + 1x + x2 = 56 + 2x + -56 + -2x

Reorder the terms:
-56 + 1x + x2 = 56 + -56 + 2x + -2x

Combine like terms: 56 + -56 = 0
-56 + 1x + x2 = 0 + 2x + -2x
-56 + 1x + x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-56 + 1x + x2 = 0

Factor a trinomial.
(-8 + -1x)(7 + -1x) = 0


Subproblem 1
Set the factor '(-8 + -1x)' equal to zero and attempt to solve:

Simplifying
-8 + -1x = 0

Solving
-8 + -1x = 0

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

Add '8' to each side of the equation.
-8 + 8 + -1x = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -1x = 0 + 8
-1x = 0 + 8

Combine like terms: 0 + 8 = 8
-1x = 8

Divide each side by '-1'.
x = -8

Simplifying
x = -8

Subproblem 2
Set the factor '(7 + -1x)' equal to zero and attempt to solve:

Simplifying
7 + -1x = 0

Solving
7 + -1x = 0

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

Add '-7' to each side of the equation.
7 + -7 + -1x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -1x = 0 + -7
-1x = 0 + -7

Combine like terms: 0 + -7 = -7
-1x = -7

Divide each side by '-1'.
x = 7

Simplifying
x = 7
Solution
x = {-8, 7}

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