11r-r-9r=12

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Solution for 11r-r-9r=12 equation: 


Simplifying
11r + -1r + -9r = 12

Combine like terms: 11r + -1r = 10r
10r + -9r = 12

Combine like terms: 10r + -9r = 1r
1r = 12

Solving
1r = 12

Solving for variable 'r'.

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

Divide each side by '1'.
r = 12

Simplifying
r = 12

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