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Simplifying (x + -7)(5x + -100) = 0 Reorder the terms: (-7 + x)(5x + -100) = 0 Reorder the terms: (-7 + x)(-100 + 5x) = 0 Multiply (-7 + x) * (-100 + 5x) (-7(-100 + 5x) + x(-100 + 5x)) = 0 ((-100 * -7 + 5x * -7) + x(-100 + 5x)) = 0 ((700 + -35x) + x(-100 + 5x)) = 0 (700 + -35x + (-100 * x + 5x * x)) = 0 (700 + -35x + (-100x + 5x2)) = 0 Combine like terms: -35x + -100x = -135x (700 + -135x + 5x2) = 0 Solving 700 + -135x + 5x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '5'. 5(140 + -27x + x2) = 0 Factor a trinomial. 5((7 + -1x)(20 + -1x)) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7Subproblem 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 = {7, 20}
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