-2(y-1)=9

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Solution for -2(y-1)=9 equation: 


Simplifying
-2(y + -1) = 9

Reorder the terms:
-2(-1 + y) = 9
(-1 * -2 + y * -2) = 9
(2 + -2y) = 9

Solving
2 + -2y = 9

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 + -2 + -2y = 9 + -2

Combine like terms: 2 + -2 = 0
0 + -2y = 9 + -2
-2y = 9 + -2

Combine like terms: 9 + -2 = 7
-2y = 7

Divide each side by '-2'.
y = -3.5

Simplifying
y = -3.5

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