r(40)=20+.75x

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Solution for r(40)=20+.75x equation: 


Simplifying
r(40) = 20 + 0.75x

Reorder the terms for easier multiplication:
40r = 20 + 0.75x

Solving
40r = 20 + 0.75x

Solving for variable 'r'.

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

Divide each side by '40'.
r = 0.5 + 0.01875x

Simplifying
r = 0.5 + 0.01875x

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