(y-7)-(y-7)=9y

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


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

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

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

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

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

Combine like terms: -7 + 7 = 0
0 + y + -1y = 9y
y + -1y = 9y

Combine like terms: y + -1y = 0
0 = 9y

Solving
0 = 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
0 + -9y = 9y + -9y
Remove the zero:
-9y = 9y + -9y

Combine like terms: 9y + -9y = 0
-9y = 0

Divide each side by '-9'.
y = 0

Simplifying
y = 0

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