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Simplifying 21y2 = 15y Solving 21y2 = 15y Solving for variable 'y'. Reorder the terms: -15y + 21y2 = 15y + -15y Combine like terms: 15y + -15y = 0 -15y + 21y2 = 0 Factor out the Greatest Common Factor (GCF), '3y'. 3y(-5 + 7y) = 0 Ignore the factor 3.Subproblem 1
Set the factor 'y' equal to zero and attempt to solve: Simplifying y = 0 Solving y = 0 Move all terms containing y to the left, all other terms to the right. Simplifying y = 0Subproblem 2
Set the factor '(-5 + 7y)' equal to zero and attempt to solve: Simplifying -5 + 7y = 0 Solving -5 + 7y = 0 Move all terms containing y to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + 7y = 0 + 5 Combine like terms: -5 + 5 = 0 0 + 7y = 0 + 5 7y = 0 + 5 Combine like terms: 0 + 5 = 5 7y = 5 Divide each side by '7'. y = 0.7142857143 Simplifying y = 0.7142857143Solution
y = {0, 0.7142857143}
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