2y+2(y-6)=7y-5y(y-10)

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Solution for 2y+2(y-6)=7y-5y(y-10) equation:


Simplifying
2y + 2(y + -6) = 7y + -5y(y + -10)

Reorder the terms:
2y + 2(-6 + y) = 7y + -5y(y + -10)
2y + (-6 * 2 + y * 2) = 7y + -5y(y + -10)
2y + (-12 + 2y) = 7y + -5y(y + -10)

Reorder the terms:
-12 + 2y + 2y = 7y + -5y(y + -10)

Combine like terms: 2y + 2y = 4y
-12 + 4y = 7y + -5y(y + -10)

Reorder the terms:
-12 + 4y = 7y + -5y(-10 + y)
-12 + 4y = 7y + (-10 * -5y + y * -5y)
-12 + 4y = 7y + (50y + -5y2)

Combine like terms: 7y + 50y = 57y
-12 + 4y = 57y + -5y2

Solving
-12 + 4y = 57y + -5y2

Solving for variable 'y'.

Combine like terms: 4y + -57y = -53y
-12 + -53y + 5y2 = 57y + -5y2 + -57y + 5y2

Reorder the terms:
-12 + -53y + 5y2 = 57y + -57y + -5y2 + 5y2

Combine like terms: 57y + -57y = 0
-12 + -53y + 5y2 = 0 + -5y2 + 5y2
-12 + -53y + 5y2 = -5y2 + 5y2

Combine like terms: -5y2 + 5y2 = 0
-12 + -53y + 5y2 = 0

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
-2.4 + -10.6y + y2 = 0

Move the constant term to the right:

Add '2.4' to each side of the equation.
-2.4 + -10.6y + 2.4 + y2 = 0 + 2.4

Reorder the terms:
-2.4 + 2.4 + -10.6y + y2 = 0 + 2.4

Combine like terms: -2.4 + 2.4 = 0.0
0.0 + -10.6y + y2 = 0 + 2.4
-10.6y + y2 = 0 + 2.4

Combine like terms: 0 + 2.4 = 2.4
-10.6y + y2 = 2.4

The y term is -10.6y.  Take half its coefficient (-5.3).
Square it (28.09) and add it to both sides.

Add '28.09' to each side of the equation.
-10.6y + 28.09 + y2 = 2.4 + 28.09

Reorder the terms:
28.09 + -10.6y + y2 = 2.4 + 28.09

Combine like terms: 2.4 + 28.09 = 30.49
28.09 + -10.6y + y2 = 30.49

Factor a perfect square on the left side:
(y + -5.3)(y + -5.3) = 30.49

Calculate the square root of the right side: 5.521775077

Break this problem into two subproblems by setting 
(y + -5.3) equal to 5.521775077 and -5.521775077.

Subproblem 1

y + -5.3 = 5.521775077 Simplifying y + -5.3 = 5.521775077 Reorder the terms: -5.3 + y = 5.521775077 Solving -5.3 + y = 5.521775077 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '5.3' to each side of the equation. -5.3 + 5.3 + y = 5.521775077 + 5.3 Combine like terms: -5.3 + 5.3 = 0.0 0.0 + y = 5.521775077 + 5.3 y = 5.521775077 + 5.3 Combine like terms: 5.521775077 + 5.3 = 10.821775077 y = 10.821775077 Simplifying y = 10.821775077

Subproblem 2

y + -5.3 = -5.521775077 Simplifying y + -5.3 = -5.521775077 Reorder the terms: -5.3 + y = -5.521775077 Solving -5.3 + y = -5.521775077 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '5.3' to each side of the equation. -5.3 + 5.3 + y = -5.521775077 + 5.3 Combine like terms: -5.3 + 5.3 = 0.0 0.0 + y = -5.521775077 + 5.3 y = -5.521775077 + 5.3 Combine like terms: -5.521775077 + 5.3 = -0.221775077 y = -0.221775077 Simplifying y = -0.221775077

Solution

The solution to the problem is based on the solutions from the subproblems. y = {10.821775077, -0.221775077}

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