x^2+20x+9=7x-3

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Solution for x^2+20x+9=7x-3 equation:


Simplifying
x2 + 20x + 9 = 7x + -3

Reorder the terms:
9 + 20x + x2 = 7x + -3

Reorder the terms:
9 + 20x + x2 = -3 + 7x

Solving
9 + 20x + x2 = -3 + 7x

Solving for variable 'x'.

Reorder the terms:
9 + 3 + 20x + -7x + x2 = -3 + 7x + 3 + -7x

Combine like terms: 9 + 3 = 12
12 + 20x + -7x + x2 = -3 + 7x + 3 + -7x

Combine like terms: 20x + -7x = 13x
12 + 13x + x2 = -3 + 7x + 3 + -7x

Reorder the terms:
12 + 13x + x2 = -3 + 3 + 7x + -7x

Combine like terms: -3 + 3 = 0
12 + 13x + x2 = 0 + 7x + -7x
12 + 13x + x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
12 + 13x + x2 = 0

Factor a trinomial.
(12 + x)(1 + x) = 0

Subproblem 1

Set the factor '(12 + x)' equal to zero and attempt to solve: Simplifying 12 + x = 0 Solving 12 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + x = 0 + -12 x = 0 + -12 Combine like terms: 0 + -12 = -12 x = -12 Simplifying x = -12

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 = {-12, -1}

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