1909=2*3.14*r*30

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Solution for 1909=2*3.14*r*30 equation:


Simplifying
1909 = 2 * 3.14r * 30

Reorder the terms for easier multiplication:
1909 = 2 * 3.14 * 30r

Multiply 2 * 3.14
1909 = 6.28 * 30r

Multiply 6.28 * 30
1909 = 188.4r

Solving
1909 = 188.4r

Solving for variable 'r'.

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

Add '-188.4r' to each side of the equation.
1909 + -188.4r = 188.4r + -188.4r

Combine like terms: 188.4r + -188.4r = 0.0
1909 + -188.4r = 0.0

Add '-1909' to each side of the equation.
1909 + -1909 + -188.4r = 0.0 + -1909

Combine like terms: 1909 + -1909 = 0
0 + -188.4r = 0.0 + -1909
-188.4r = 0.0 + -1909

Combine like terms: 0.0 + -1909 = -1909
-188.4r = -1909

Divide each side by '-188.4'.
r = 10.13269639

Simplifying
r = 10.13269639

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