9y-8y-1=9

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Solution for 9y-8y-1=9 equation: 


Simplifying
9y + -8y + -1 = 9

Reorder the terms:
-1 + 9y + -8y = 9

Combine like terms: 9y + -8y = 1y
-1 + 1y = 9

Solving
-1 + 1y = 9

Solving for variable 'y'.

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

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

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

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

Divide each side by '1'.
y = 10

Simplifying
y = 10

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