18=9-9y

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Solution for 18=9-9y equation:


Simplifying
18 = 9 + -9y

Solving
18 = 9 + -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.
18 + 9y = 9 + -9y + 9y

Combine like terms: -9y + 9y = 0
18 + 9y = 9 + 0
18 + 9y = 9

Add '-18' to each side of the equation.
18 + -18 + 9y = 9 + -18

Combine like terms: 18 + -18 = 0
0 + 9y = 9 + -18
9y = 9 + -18

Combine like terms: 9 + -18 = -9
9y = -9

Divide each side by '9'.
y = -1

Simplifying
y = -1

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