7y^2-3y^2=42y+9y

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Solution for 7y^2-3y^2=42y+9y equation:


Simplifying
7y2 + -3y2 = 42y + 9y

Combine like terms: 7y2 + -3y2 = 4y2
4y2 = 42y + 9y

Combine like terms: 42y + 9y = 51y
4y2 = 51y

Solving
4y2 = 51y

Solving for variable 'y'.

Reorder the terms:
-51y + 4y2 = 51y + -51y

Combine like terms: 51y + -51y = 0
-51y + 4y2 = 0

Factor out the Greatest Common Factor (GCF), 'y'.
y(-51 + 4y) = 0

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 '(-51 + 4y)' equal to zero and attempt to solve: Simplifying -51 + 4y = 0 Solving -51 + 4y = 0 Move all terms containing y to the left, all other terms to the right. Add '51' to each side of the equation. -51 + 51 + 4y = 0 + 51 Combine like terms: -51 + 51 = 0 0 + 4y = 0 + 51 4y = 0 + 51 Combine like terms: 0 + 51 = 51 4y = 51 Divide each side by '4'. y = 12.75 Simplifying y = 12.75

Solution

y = {0, 12.75}

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