9r+9=90

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Solution for 9r+9=90 equation: 


Simplifying
9r + 9 = 90

Reorder the terms:
9 + 9r = 90

Solving
9 + 9r = 90

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 = 90 + -9

Combine like terms: 9 + -9 = 0
0 + 9r = 90 + -9
9r = 90 + -9

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

Divide each side by '9'.
r = 9

Simplifying
r = 9

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