r(5)=5(85-2(5))

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Solution for r(5)=5(85-2(5)) equation: 


Simplifying
r(5) = 5(85 + -2(5))

Reorder the terms for easier multiplication:
5r = 5(85 + -2(5))

Multiply -2 * 5
5r = 5(85 + -10)

Combine like terms: 85 + -10 = 75
5r = 5(75)

Multiply 5 * 75
5r = 375

Solving
5r = 375

Solving for variable 'r'.

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

Divide each side by '5'.
r = 75

Simplifying
r = 75

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