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Simplifying x2 + 20x + 31 = 7x + 1 Reorder the terms: 31 + 20x + x2 = 7x + 1 Reorder the terms: 31 + 20x + x2 = 1 + 7x Solving 31 + 20x + x2 = 1 + 7x Solving for variable 'x'. Reorder the terms: 31 + -1 + 20x + -7x + x2 = 1 + 7x + -1 + -7x Combine like terms: 31 + -1 = 30 30 + 20x + -7x + x2 = 1 + 7x + -1 + -7x Combine like terms: 20x + -7x = 13x 30 + 13x + x2 = 1 + 7x + -1 + -7x Reorder the terms: 30 + 13x + x2 = 1 + -1 + 7x + -7x Combine like terms: 1 + -1 = 0 30 + 13x + x2 = 0 + 7x + -7x 30 + 13x + x2 = 7x + -7x Combine like terms: 7x + -7x = 0 30 + 13x + x2 = 0 Factor a trinomial. (10 + x)(3 + x) = 0Subproblem 1
Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10Subproblem 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 = -3Solution
x = {-10, -3}
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