(y-5)-(y+7)=8y

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Solution for (y-5)-(y+7)=8y equation:


Simplifying
(y + -5) + -1(y + 7) = 8y

Reorder the terms:
(-5 + y) + -1(y + 7) = 8y

Remove parenthesis around (-5 + y)
-5 + y + -1(y + 7) = 8y

Reorder the terms:
-5 + y + -1(7 + y) = 8y
-5 + y + (7 * -1 + y * -1) = 8y
-5 + y + (-7 + -1y) = 8y

Reorder the terms:
-5 + -7 + y + -1y = 8y

Combine like terms: -5 + -7 = -12
-12 + y + -1y = 8y

Combine like terms: y + -1y = 0
-12 + 0 = 8y
-12 = 8y

Solving
-12 = 8y

Solving for variable 'y'.

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

Add '-8y' to each side of the equation.
-12 + -8y = 8y + -8y

Combine like terms: 8y + -8y = 0
-12 + -8y = 0

Add '12' to each side of the equation.
-12 + 12 + -8y = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -8y = 0 + 12
-8y = 0 + 12

Combine like terms: 0 + 12 = 12
-8y = 12

Divide each side by '-8'.
y = -1.5

Simplifying
y = -1.5

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