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Simplifying 2x2 + -7x = 11x + 20 Reorder the terms: -7x + 2x2 = 11x + 20 Reorder the terms: -7x + 2x2 = 20 + 11x Solving -7x + 2x2 = 20 + 11x Solving for variable 'x'. Reorder the terms: -20 + -7x + -11x + 2x2 = 20 + 11x + -20 + -11x Combine like terms: -7x + -11x = -18x -20 + -18x + 2x2 = 20 + 11x + -20 + -11x Reorder the terms: -20 + -18x + 2x2 = 20 + -20 + 11x + -11x Combine like terms: 20 + -20 = 0 -20 + -18x + 2x2 = 0 + 11x + -11x -20 + -18x + 2x2 = 11x + -11x Combine like terms: 11x + -11x = 0 -20 + -18x + 2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-10 + -9x + x2) = 0 Factor a trinomial. 2((-1 + -1x)(10 + -1x)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 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 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1Subproblem 2
Set the factor '(10 + -1x)' equal to zero and attempt to solve: Simplifying 10 + -1x = 0 Solving 10 + -1x = 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 + -1x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1x = 0 + -10 -1x = 0 + -10 Combine like terms: 0 + -10 = -10 -1x = -10 Divide each side by '-1'. x = 10 Simplifying x = 10Solution
x = {-1, 10}
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