(y-1)(y+2)=(y-6)(y-4)+7

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Solution for (y-1)(y+2)=(y-6)(y-4)+7 equation:


Simplifying
(y + -1)(y + 2) = (y + -6)(y + -4) + 7

Reorder the terms:
(-1 + y)(y + 2) = (y + -6)(y + -4) + 7

Reorder the terms:
(-1 + y)(2 + y) = (y + -6)(y + -4) + 7

Multiply (-1 + y) * (2 + y)
(-1(2 + y) + y(2 + y)) = (y + -6)(y + -4) + 7
((2 * -1 + y * -1) + y(2 + y)) = (y + -6)(y + -4) + 7
((-2 + -1y) + y(2 + y)) = (y + -6)(y + -4) + 7
(-2 + -1y + (2 * y + y * y)) = (y + -6)(y + -4) + 7
(-2 + -1y + (2y + y2)) = (y + -6)(y + -4) + 7

Combine like terms: -1y + 2y = 1y
(-2 + 1y + y2) = (y + -6)(y + -4) + 7

Reorder the terms:
-2 + 1y + y2 = (-6 + y)(y + -4) + 7

Reorder the terms:
-2 + 1y + y2 = (-6 + y)(-4 + y) + 7

Multiply (-6 + y) * (-4 + y)
-2 + 1y + y2 = (-6(-4 + y) + y(-4 + y)) + 7
-2 + 1y + y2 = ((-4 * -6 + y * -6) + y(-4 + y)) + 7
-2 + 1y + y2 = ((24 + -6y) + y(-4 + y)) + 7
-2 + 1y + y2 = (24 + -6y + (-4 * y + y * y)) + 7
-2 + 1y + y2 = (24 + -6y + (-4y + y2)) + 7

Combine like terms: -6y + -4y = -10y
-2 + 1y + y2 = (24 + -10y + y2) + 7

Reorder the terms:
-2 + 1y + y2 = 24 + 7 + -10y + y2

Combine like terms: 24 + 7 = 31
-2 + 1y + y2 = 31 + -10y + y2

Add '-1y2' to each side of the equation.
-2 + 1y + y2 + -1y2 = 31 + -10y + y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-2 + 1y + 0 = 31 + -10y + y2 + -1y2
-2 + 1y = 31 + -10y + y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-2 + 1y = 31 + -10y + 0
-2 + 1y = 31 + -10y

Solving
-2 + 1y = 31 + -10y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '10y' to each side of the equation.
-2 + 1y + 10y = 31 + -10y + 10y

Combine like terms: 1y + 10y = 11y
-2 + 11y = 31 + -10y + 10y

Combine like terms: -10y + 10y = 0
-2 + 11y = 31 + 0
-2 + 11y = 31

Add '2' to each side of the equation.
-2 + 2 + 11y = 31 + 2

Combine like terms: -2 + 2 = 0
0 + 11y = 31 + 2
11y = 31 + 2

Combine like terms: 31 + 2 = 33
11y = 33

Divide each side by '11'.
y = 3

Simplifying
y = 3

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