9=-2(y-1)

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


Simplifying
9 = -2(y + -1)

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

Solving
9 = 2 + -2y

Solving for variable 'y'.

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

Add '2y' to each side of the equation.
9 + 2y = 2 + -2y + 2y

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

Add '-9' to each side of the equation.
9 + -9 + 2y = 2 + -9

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

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

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

Simplifying
y = -3.5

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