(Y-7)-(y-9)=8y

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Solution for (Y-7)-(y-9)=8y equation:


Simplifying
(Y + -7) + -1(y + -9) = 8y

Reorder the terms:
(-7 + Y) + -1(y + -9) = 8y

Remove parenthesis around (-7 + Y)
-7 + Y + -1(y + -9) = 8y

Reorder the terms:
-7 + Y + -1(-9 + y) = 8y
-7 + Y + (-9 * -1 + y * -1) = 8y
-7 + Y + (9 + -1y) = 8y

Reorder the terms:
-7 + 9 + Y + -1y = 8y

Combine like terms: -7 + 9 = 2
2 + Y + -1y = 8y

Solving
2 + Y + -1y = 8y

Solving for variable 'Y'.

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

Add '-2' to each side of the equation.
2 + Y + -2 + -1y = -2 + 8y

Reorder the terms:
2 + -2 + Y + -1y = -2 + 8y

Combine like terms: 2 + -2 = 0
0 + Y + -1y = -2 + 8y
Y + -1y = -2 + 8y

Add 'y' to each side of the equation.
Y + -1y + y = -2 + 8y + y

Combine like terms: -1y + y = 0
Y + 0 = -2 + 8y + y
Y = -2 + 8y + y

Combine like terms: 8y + y = 9y
Y = -2 + 9y

Simplifying
Y = -2 + 9y

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