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Simplifying 21X3 + -15X2 = 0 Reorder the terms: -15X2 + 21X3 = 0 Solving -15X2 + 21X3 = 0 Solving for variable 'X'. Factor out the Greatest Common Factor (GCF), '3X2'. 3X2(-5 + 7X) = 0 Ignore the factor 3.Subproblem 1
Set the factor 'X2' equal to zero and attempt to solve: Simplifying X2 = 0 Solving X2 = 0 Move all terms containing X to the left, all other terms to the right. Simplifying X2 = 0 Take the square root of each side: X = {0}Subproblem 2
Set the factor '(-5 + 7X)' equal to zero and attempt to solve: Simplifying -5 + 7X = 0 Solving -5 + 7X = 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 + 7X = 0 + 5 Combine like terms: -5 + 5 = 0 0 + 7X = 0 + 5 7X = 0 + 5 Combine like terms: 0 + 5 = 5 7X = 5 Divide each side by '7'. X = 0.7142857143 Simplifying X = 0.7142857143Solution
X = {0, 0.7142857143}
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