90-9y=180

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Solution for 90-9y=180 equation: 


Simplifying
90 + -9y = 180

Solving
90 + -9y = 180

Solving for variable 'y'.

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

Add '-90' to each side of the equation.
90 + -90 + -9y = 180 + -90

Combine like terms: 90 + -90 = 0
0 + -9y = 180 + -90
-9y = 180 + -90

Combine like terms: 180 + -90 = 90
-9y = 90

Divide each side by '-9'.
y = -10

Simplifying
y = -10

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