18.8=2*3.14*r

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Solution for 18.8=2*3.14*r equation:


Simplifying
18.8 = 2 * 3.14r

Multiply 2 * 3.14
18.8 = 6.28r

Solving
18.8 = 6.28r

Solving for variable 'r'.

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

Add '-6.28r' to each side of the equation.
18.8 + -6.28r = 6.28r + -6.28r

Combine like terms: 6.28r + -6.28r = 0.00
18.8 + -6.28r = 0.00

Add '-18.8' to each side of the equation.
18.8 + -18.8 + -6.28r = 0.00 + -18.8

Combine like terms: 18.8 + -18.8 = 0.0
0.0 + -6.28r = 0.00 + -18.8
-6.28r = 0.00 + -18.8

Combine like terms: 0.00 + -18.8 = -18.8
-6.28r = -18.8

Divide each side by '-6.28'.
r = 2.993630573

Simplifying
r = 2.993630573

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