5.5r-r=90

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Solution for 5.5r-r=90 equation: 


Simplifying
5.5r + -1r = 90

Combine like terms: 5.5r + -1r = 4.5r
4.5r = 90

Solving
4.5r = 90

Solving for variable 'r'.

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

Divide each side by '4.5'.
r = 20

Simplifying
r = 20

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