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