9r-9=81

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Solution for 9r-9=81 equation:


Simplifying
9r + -9 = 81

Reorder the terms:
-9 + 9r = 81

Solving
-9 + 9r = 81

Solving for variable 'r'.

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

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

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

Combine like terms: 81 + 9 = 90
9r = 90

Divide each side by '9'.
r = 10

Simplifying
r = 10

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