r(x)=270x-90x

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Solution for r(x)=270x-90x equation: 


Simplifying
r(x) = 270x + -90x

Multiply r * x
rx = 270x + -90x

Combine like terms: 270x + -90x = 180x
rx = 180x

Solving
rx = 180x

Solving for variable 'r'.

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

Divide each side by 'x'.
r = 180

Simplifying
r = 180

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