21y^2=7y

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Solution for 21y^2=7y equation:


Simplifying
21y2 = 7y

Solving
21y2 = 7y

Solving for variable 'y'.

Reorder the terms:
-7y + 21y2 = 7y + -7y

Combine like terms: 7y + -7y = 0
-7y + 21y2 = 0

Factor out the Greatest Common Factor (GCF), '7y'.
7y(-1 + 3y) = 0

Ignore the factor 7.

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 '(-1 + 3y)' equal to zero and attempt to solve: Simplifying -1 + 3y = 0 Solving -1 + 3y = 0 Move all terms containing y to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 3y = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 3y = 0 + 1 3y = 0 + 1 Combine like terms: 0 + 1 = 1 3y = 1 Divide each side by '3'. y = 0.3333333333 Simplifying y = 0.3333333333

Solution

y = {0, 0.3333333333}

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