4y-5y=9

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Solution for 4y-5y=9 equation: 


Simplifying
4y + -5y = 9

Combine like terms: 4y + -5y = -1y
-1y = 9

Solving
-1y = 9

Solving for variable 'y'.

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

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

Simplifying
y = -9

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