72+9=9y

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Solution for 72+9=9y equation:


Simplifying
72 + 9 = 9y

Combine like terms: 72 + 9 = 81
81 = 9y

Solving
81 = 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.
81 + -9y = 9y + -9y

Combine like terms: 9y + -9y = 0
81 + -9y = 0

Add '-81' to each side of the equation.
81 + -81 + -9y = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -9y = 0 + -81
-9y = 0 + -81

Combine like terms: 0 + -81 = -81
-9y = -81

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

Simplifying
y = 9

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