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Simplifying 15(x + 20) + 15x = 2x(x + 20) Reorder the terms: 15(20 + x) + 15x = 2x(x + 20) (20 * 15 + x * 15) + 15x = 2x(x + 20) (300 + 15x) + 15x = 2x(x + 20) Combine like terms: 15x + 15x = 30x 300 + 30x = 2x(x + 20) Reorder the terms: 300 + 30x = 2x(20 + x) 300 + 30x = (20 * 2x + x * 2x) 300 + 30x = (40x + 2x2) Solving 300 + 30x = 40x + 2x2 Solving for variable 'x'. Combine like terms: 30x + -40x = -10x 300 + -10x + -2x2 = 40x + 2x2 + -40x + -2x2 Reorder the terms: 300 + -10x + -2x2 = 40x + -40x + 2x2 + -2x2 Combine like terms: 40x + -40x = 0 300 + -10x + -2x2 = 0 + 2x2 + -2x2 300 + -10x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 300 + -10x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(150 + -5x + -1x2) = 0 Factor a trinomial. 2((10 + -1x)(15 + x)) = 0 Ignore the factor 2.Subproblem 1
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 = 10Subproblem 2
Set the factor '(15 + x)' equal to zero and attempt to solve: Simplifying 15 + x = 0 Solving 15 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = 0 + -15 Combine like terms: 15 + -15 = 0 0 + x = 0 + -15 x = 0 + -15 Combine like terms: 0 + -15 = -15 x = -15 Simplifying x = -15Solution
x = {10, -15}
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