9x+9y=81

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Solution for 9x+9y=81 equation: 


Simplifying
9x + 9y = 81

Solving
9x + 9y = 81

Solving for variable 'x'.

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

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

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

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

Simplifying
x = 9 + -1y

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