5x^2+7x+20=7x^2+3x-10

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Solution for 5x^2+7x+20=7x^2+3x-10 equation:


Simplifying
5x2 + 7x + 20 = 7x2 + 3x + -10

Reorder the terms:
20 + 7x + 5x2 = 7x2 + 3x + -10

Reorder the terms:
20 + 7x + 5x2 = -10 + 3x + 7x2

Solving
20 + 7x + 5x2 = -10 + 3x + 7x2

Solving for variable 'x'.

Reorder the terms:
20 + 10 + 7x + -3x + 5x2 + -7x2 = -10 + 3x + 7x2 + 10 + -3x + -7x2

Combine like terms: 20 + 10 = 30
30 + 7x + -3x + 5x2 + -7x2 = -10 + 3x + 7x2 + 10 + -3x + -7x2

Combine like terms: 7x + -3x = 4x
30 + 4x + 5x2 + -7x2 = -10 + 3x + 7x2 + 10 + -3x + -7x2

Combine like terms: 5x2 + -7x2 = -2x2
30 + 4x + -2x2 = -10 + 3x + 7x2 + 10 + -3x + -7x2

Reorder the terms:
30 + 4x + -2x2 = -10 + 10 + 3x + -3x + 7x2 + -7x2

Combine like terms: -10 + 10 = 0
30 + 4x + -2x2 = 0 + 3x + -3x + 7x2 + -7x2
30 + 4x + -2x2 = 3x + -3x + 7x2 + -7x2

Combine like terms: 3x + -3x = 0
30 + 4x + -2x2 = 0 + 7x2 + -7x2
30 + 4x + -2x2 = 7x2 + -7x2

Combine like terms: 7x2 + -7x2 = 0
30 + 4x + -2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(15 + 2x + -1x2) = 0

Factor a trinomial.
2((5 + -1x)(3 + x)) = 0

Ignore the factor 2.

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 '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Solution

x = {5, -3}

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