-10y+18=-3(5y-7)5y

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Solution for -10y+18=-3(5y-7)5y equation:


Simplifying
-10y + 18 = -3(5y + -7) * 5y

Reorder the terms:
18 + -10y = -3(5y + -7) * 5y

Reorder the terms:
18 + -10y = -3(-7 + 5y) * 5y

Reorder the terms for easier multiplication:
18 + -10y = -3 * 5y(-7 + 5y)

Multiply -3 * 5
18 + -10y = -15y(-7 + 5y)
18 + -10y = (-7 * -15y + 5y * -15y)
18 + -10y = (105y + -75y2)

Solving
18 + -10y = 105y + -75y2

Solving for variable 'y'.

Combine like terms: -10y + -105y = -115y
18 + -115y + 75y2 = 105y + -75y2 + -105y + 75y2

Reorder the terms:
18 + -115y + 75y2 = 105y + -105y + -75y2 + 75y2

Combine like terms: 105y + -105y = 0
18 + -115y + 75y2 = 0 + -75y2 + 75y2
18 + -115y + 75y2 = -75y2 + 75y2

Combine like terms: -75y2 + 75y2 = 0
18 + -115y + 75y2 = 0

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

Divide each side by '75'.
0.24 + -1.533333333y + y2 = 0

Move the constant term to the right:

Add '-0.24' to each side of the equation.
0.24 + -1.533333333y + -0.24 + y2 = 0 + -0.24

Reorder the terms:
0.24 + -0.24 + -1.533333333y + y2 = 0 + -0.24

Combine like terms: 0.24 + -0.24 = 0.00
0.00 + -1.533333333y + y2 = 0 + -0.24
-1.533333333y + y2 = 0 + -0.24

Combine like terms: 0 + -0.24 = -0.24
-1.533333333y + y2 = -0.24

The y term is -1.533333333y.  Take half its coefficient (-0.7666666665).
Square it (0.5877777775) and add it to both sides.

Add '0.5877777775' to each side of the equation.
-1.533333333y + 0.5877777775 + y2 = -0.24 + 0.5877777775

Reorder the terms:
0.5877777775 + -1.533333333y + y2 = -0.24 + 0.5877777775

Combine like terms: -0.24 + 0.5877777775 = 0.3477777775
0.5877777775 + -1.533333333y + y2 = 0.3477777775

Factor a perfect square on the left side:
(y + -0.7666666665)(y + -0.7666666665) = 0.3477777775

Calculate the square root of the right side: 0.589726867

Break this problem into two subproblems by setting 
(y + -0.7666666665) equal to 0.589726867 and -0.589726867.

Subproblem 1

y + -0.7666666665 = 0.589726867 Simplifying y + -0.7666666665 = 0.589726867 Reorder the terms: -0.7666666665 + y = 0.589726867 Solving -0.7666666665 + y = 0.589726867 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.7666666665' to each side of the equation. -0.7666666665 + 0.7666666665 + y = 0.589726867 + 0.7666666665 Combine like terms: -0.7666666665 + 0.7666666665 = 0.0000000000 0.0000000000 + y = 0.589726867 + 0.7666666665 y = 0.589726867 + 0.7666666665 Combine like terms: 0.589726867 + 0.7666666665 = 1.3563935335 y = 1.3563935335 Simplifying y = 1.3563935335

Subproblem 2

y + -0.7666666665 = -0.589726867 Simplifying y + -0.7666666665 = -0.589726867 Reorder the terms: -0.7666666665 + y = -0.589726867 Solving -0.7666666665 + y = -0.589726867 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.7666666665' to each side of the equation. -0.7666666665 + 0.7666666665 + y = -0.589726867 + 0.7666666665 Combine like terms: -0.7666666665 + 0.7666666665 = 0.0000000000 0.0000000000 + y = -0.589726867 + 0.7666666665 y = -0.589726867 + 0.7666666665 Combine like terms: -0.589726867 + 0.7666666665 = 0.1769397995 y = 0.1769397995 Simplifying y = 0.1769397995

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.3563935335, 0.1769397995}

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