10y-1=9y

Solution for 10y-1=9y equation:

Simplifying
10y + -1 = 9y

Reorder the terms:
-1 + 10y = 9y

Solving
-1 + 10y = 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
-1 + 10y + -9y = 9y + -9y

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

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

Add '1' to each side of the equation.
-1 + 1 + 1y = 0 + 1

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

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

Divide each side by '1'.
y = 1

Simplifying
y = 1