9=2y-1-y

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


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

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

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

Solving
9 = -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.
9 + -1y = -1 + 1y + -1y

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

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

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

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

Divide each side by '-1'.
y = 10

Simplifying
y = 10

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