21y^2=15y

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Solution for 21y^2=15y equation:


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 = 0

Subproblem 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 = 0.7142857143

Solution

y = {0, 0.7142857143}

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