12-9[y+5]=-[1-y]

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Solution for 12-9[y+5]=-[1-y] equation:


Simplifying
12 + -9[y + 5] = -1[1 + -1y]

Reorder the terms:
12 + -9[5 + y] = -1[1 + -1y]
12 + [5 * -9 + y * -9] = -1[1 + -1y]
12 + [-45 + -9y] = -1[1 + -1y]

Combine like terms: 12 + -45 = -33
-33 + -9y = -1[1 + -1y]
-33 + -9y = [1 * -1 + -1y * -1]
-33 + -9y = [-1 + 1y]

Solving
-33 + -9y = -1 + 1y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
-33 + -9y + -1y = -1 + 1y + -1y

Combine like terms: -9y + -1y = -10y
-33 + -10y = -1 + 1y + -1y

Combine like terms: 1y + -1y = 0
-33 + -10y = -1 + 0
-33 + -10y = -1

Add '33' to each side of the equation.
-33 + 33 + -10y = -1 + 33

Combine like terms: -33 + 33 = 0
0 + -10y = -1 + 33
-10y = -1 + 33

Combine like terms: -1 + 33 = 32
-10y = 32

Divide each side by '-10'.
y = -3.2

Simplifying
y = -3.2

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