9(4-5y)=81

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Solution for 9(4-5y)=81 equation: 


Simplifying
9(4 + -5y) = 81
(4 * 9 + -5y * 9) = 81
(36 + -45y) = 81

Solving
36 + -45y = 81

Solving for variable 'y'.

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

Add '-36' to each side of the equation.
36 + -36 + -45y = 81 + -36

Combine like terms: 36 + -36 = 0
0 + -45y = 81 + -36
-45y = 81 + -36

Combine like terms: 81 + -36 = 45
-45y = 45

Divide each side by '-45'.
y = -1

Simplifying
y = -1

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