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Simplifying x(36 + -4x) = 80 (36 * x + -4x * x) = 80 (36x + -4x2) = 80 Solving 36x + -4x2 = 80 Solving for variable 'x'. Reorder the terms: -80 + 36x + -4x2 = 80 + -80 Combine like terms: 80 + -80 = 0 -80 + 36x + -4x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(-20 + 9x + -1x2) = 0 Factor a trinomial. 4((-5 + x)(4 + -1x)) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(-5 + x)' equal to zero and attempt to solve: Simplifying -5 + x = 0 Solving -5 + x = 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 + x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + x = 0 + 5 x = 0 + 5 Combine like terms: 0 + 5 = 5 x = 5 Simplifying x = 5Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4Solution
x = {5, 4}
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