55.96=3.1415*r*8.5

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Solution for 55.96=3.1415*r*8.5 equation: 


Simplifying
55.96 = 3.1415r * 8.5

Reorder the terms for easier multiplication:
55.96 = 3.1415 * 8.5r

Multiply 3.1415 * 8.5
55.96 = 26.70275r

Solving
55.96 = 26.70275r

Solving for variable 'r'.

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

Add '-26.70275r' to each side of the equation.
55.96 + -26.70275r = 26.70275r + -26.70275r

Combine like terms: 26.70275r + -26.70275r = 0.00000
55.96 + -26.70275r = 0.00000

Add '-55.96' to each side of the equation.
55.96 + -55.96 + -26.70275r = 0.00000 + -55.96

Combine like terms: 55.96 + -55.96 = 0.00
0.00 + -26.70275r = 0.00000 + -55.96
-26.70275r = 0.00000 + -55.96

Combine like terms: 0.00000 + -55.96 = -55.96
-26.70275r = -55.96

Divide each side by '-26.70275'.
r = 2.095664304

Simplifying
r = 2.095664304

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