4y-5y=81

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Solution for 4y-5y=81 equation: 


Simplifying
4y + -5y = 81

Combine like terms: 4y + -5y = -1y
-1y = 81

Solving
-1y = 81

Solving for variable 'y'.

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

Divide each side by '-1'.
y = -81

Simplifying
y = -81

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