.02(y-1).20y=.08y-.3

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Solution for .02(y-1).20y=.08y-.3 equation:


Simplifying
0.02(y + -1) * 0.20y = 0.08y + -0.3

Reorder the terms:
0.02(-1 + y) * 0.20y = 0.08y + -0.3

Reorder the terms for easier multiplication:
0.02 * 0.20y(-1 + y) = 0.08y + -0.3

Multiply 0.02 * 0.20
0.004y(-1 + y) = 0.08y + -0.3
(-1 * 0.004y + y * 0.004y) = 0.08y + -0.3
(-0.004y + 0.004y2) = 0.08y + -0.3

Reorder the terms:
-0.004y + 0.004y2 = -0.3 + 0.08y

Solving
-0.004y + 0.004y2 = -0.3 + 0.08y

Solving for variable 'y'.

Reorder the terms:
0.3 + -0.004y + -0.08y + 0.004y2 = -0.3 + 0.08y + 0.3 + -0.08y

Combine like terms: -0.004y + -0.08y = -0.084y
0.3 + -0.084y + 0.004y2 = -0.3 + 0.08y + 0.3 + -0.08y

Reorder the terms:
0.3 + -0.084y + 0.004y2 = -0.3 + 0.3 + 0.08y + -0.08y

Combine like terms: -0.3 + 0.3 = 0.0
0.3 + -0.084y + 0.004y2 = 0.0 + 0.08y + -0.08y
0.3 + -0.084y + 0.004y2 = 0.08y + -0.08y

Combine like terms: 0.08y + -0.08y = 0.00
0.3 + -0.084y + 0.004y2 = 0.00

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

Divide each side by '0.004'.
75 + -21y + y2 = 0

Move the constant term to the right:

Add '-75' to each side of the equation.
75 + -21y + -75 + y2 = 0 + -75

Reorder the terms:
75 + -75 + -21y + y2 = 0 + -75

Combine like terms: 75 + -75 = 0
0 + -21y + y2 = 0 + -75
-21y + y2 = 0 + -75

Combine like terms: 0 + -75 = -75
-21y + y2 = -75

The y term is -21y.  Take half its coefficient (-10.5).
Square it (110.25) and add it to both sides.

Add '110.25' to each side of the equation.
-21y + 110.25 + y2 = -75 + 110.25

Reorder the terms:
110.25 + -21y + y2 = -75 + 110.25

Combine like terms: -75 + 110.25 = 35.25
110.25 + -21y + y2 = 35.25

Factor a perfect square on the left side:
(y + -10.5)(y + -10.5) = 35.25

Calculate the square root of the right side: 5.937171044

Break this problem into two subproblems by setting 
(y + -10.5) equal to 5.937171044 and -5.937171044.

Subproblem 1

y + -10.5 = 5.937171044 Simplifying y + -10.5 = 5.937171044 Reorder the terms: -10.5 + y = 5.937171044 Solving -10.5 + y = 5.937171044 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '10.5' to each side of the equation. -10.5 + 10.5 + y = 5.937171044 + 10.5 Combine like terms: -10.5 + 10.5 = 0.0 0.0 + y = 5.937171044 + 10.5 y = 5.937171044 + 10.5 Combine like terms: 5.937171044 + 10.5 = 16.437171044 y = 16.437171044 Simplifying y = 16.437171044

Subproblem 2

y + -10.5 = -5.937171044 Simplifying y + -10.5 = -5.937171044 Reorder the terms: -10.5 + y = -5.937171044 Solving -10.5 + y = -5.937171044 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '10.5' to each side of the equation. -10.5 + 10.5 + y = -5.937171044 + 10.5 Combine like terms: -10.5 + 10.5 = 0.0 0.0 + y = -5.937171044 + 10.5 y = -5.937171044 + 10.5 Combine like terms: -5.937171044 + 10.5 = 4.562828956 y = 4.562828956 Simplifying y = 4.562828956

Solution

The solution to the problem is based on the solutions from the subproblems. y = {16.437171044, 4.562828956}

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