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Simplifying (30 + -2x)(20 + -2x) = 200 Multiply (30 + -2x) * (20 + -2x) (30(20 + -2x) + -2x * (20 + -2x)) = 200 ((20 * 30 + -2x * 30) + -2x * (20 + -2x)) = 200 ((600 + -60x) + -2x * (20 + -2x)) = 200 (600 + -60x + (20 * -2x + -2x * -2x)) = 200 (600 + -60x + (-40x + 4x2)) = 200 Combine like terms: -60x + -40x = -100x (600 + -100x + 4x2) = 200 Solving 600 + -100x + 4x2 = 200 Solving for variable 'x'. Reorder the terms: 600 + -200 + -100x + 4x2 = 200 + -200 Combine like terms: 600 + -200 = 400 400 + -100x + 4x2 = 200 + -200 Combine like terms: 200 + -200 = 0 400 + -100x + 4x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(100 + -25x + x2) = 0 Factor a trinomial. 4((5 + -1x)(20 + -1x)) = 0 Ignore the factor 4.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 = 5Subproblem 2
Set the factor '(20 + -1x)' equal to zero and attempt to solve: Simplifying 20 + -1x = 0 Solving 20 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -1x = 0 + -20 -1x = 0 + -20 Combine like terms: 0 + -20 = -20 -1x = -20 Divide each side by '-1'. x = 20 Simplifying x = 20Solution
x = {5, 20}
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