-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 = 95y
18 + 95y + -75y2 = -105y + 75y2 + 105y + -75y2

Reorder the terms:
18 + 95y + -75y2 = -105y + 105y + 75y2 + -75y2

Combine like terms: -105y + 105y = 0
18 + 95y + -75y2 = 0 + 75y2 + -75y2
18 + 95y + -75y2 = 75y2 + -75y2

Combine like terms: 75y2 + -75y2 = 0
18 + 95y + -75y2 = 0

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

Divide each side by '-75'.
-0.24 + -1.266666667y + y2 = 0

Move the constant term to the right:

Add '0.24' to each side of the equation.
-0.24 + -1.266666667y + 0.24 + y2 = 0 + 0.24

Reorder the terms:
-0.24 + 0.24 + -1.266666667y + y2 = 0 + 0.24

Combine like terms: -0.24 + 0.24 = 0.00
0.00 + -1.266666667y + y2 = 0 + 0.24
-1.266666667y + y2 = 0 + 0.24

Combine like terms: 0 + 0.24 = 0.24
-1.266666667y + y2 = 0.24

The y term is -1.266666667y.  Take half its coefficient (-0.6333333335).
Square it (0.4011111113) and add it to both sides.

Add '0.4011111113' to each side of the equation.
-1.266666667y + 0.4011111113 + y2 = 0.24 + 0.4011111113

Reorder the terms:
0.4011111113 + -1.266666667y + y2 = 0.24 + 0.4011111113

Combine like terms: 0.24 + 0.4011111113 = 0.6411111113
0.4011111113 + -1.266666667y + y2 = 0.6411111113

Factor a perfect square on the left side:
(y + -0.6333333335)(y + -0.6333333335) = 0.6411111113

Calculate the square root of the right side: 0.800694143

Break this problem into two subproblems by setting 
(y + -0.6333333335) equal to 0.800694143 and -0.800694143.

Subproblem 1

y + -0.6333333335 = 0.800694143 Simplifying y + -0.6333333335 = 0.800694143 Reorder the terms: -0.6333333335 + y = 0.800694143 Solving -0.6333333335 + y = 0.800694143 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.6333333335' to each side of the equation. -0.6333333335 + 0.6333333335 + y = 0.800694143 + 0.6333333335 Combine like terms: -0.6333333335 + 0.6333333335 = 0.0000000000 0.0000000000 + y = 0.800694143 + 0.6333333335 y = 0.800694143 + 0.6333333335 Combine like terms: 0.800694143 + 0.6333333335 = 1.4340274765 y = 1.4340274765 Simplifying y = 1.4340274765

Subproblem 2

y + -0.6333333335 = -0.800694143 Simplifying y + -0.6333333335 = -0.800694143 Reorder the terms: -0.6333333335 + y = -0.800694143 Solving -0.6333333335 + y = -0.800694143 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.6333333335' to each side of the equation. -0.6333333335 + 0.6333333335 + y = -0.800694143 + 0.6333333335 Combine like terms: -0.6333333335 + 0.6333333335 = 0.0000000000 0.0000000000 + y = -0.800694143 + 0.6333333335 y = -0.800694143 + 0.6333333335 Combine like terms: -0.800694143 + 0.6333333335 = -0.1673608095 y = -0.1673608095 Simplifying y = -0.1673608095

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.4340274765, -0.1673608095}

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