-2y-9=-y+12

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Solution for -2y-9=-y+12 equation:


Simplifying
-2y + -9 = -1y + 12

Reorder the terms:
-9 + -2y = -1y + 12

Reorder the terms:
-9 + -2y = 12 + -1y

Solving
-9 + -2y = 12 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
-9 + -2y + y = 12 + -1y + y

Combine like terms: -2y + y = -1y
-9 + -1y = 12 + -1y + y

Combine like terms: -1y + y = 0
-9 + -1y = 12 + 0
-9 + -1y = 12

Add '9' to each side of the equation.
-9 + 9 + -1y = 12 + 9

Combine like terms: -9 + 9 = 0
0 + -1y = 12 + 9
-1y = 12 + 9

Combine like terms: 12 + 9 = 21
-1y = 21

Divide each side by '-1'.
y = -21

Simplifying
y = -21

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