80=2*3.14r

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Solution for 80=2*3.14r equation:


Simplifying
80 = 2 * 3.14r

Multiply 2 * 3.14
80 = 6.28r

Solving
80 = 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.
80 + -6.28r = 6.28r + -6.28r

Combine like terms: 6.28r + -6.28r = 0.00
80 + -6.28r = 0.00

Add '-80' to each side of the equation.
80 + -80 + -6.28r = 0.00 + -80

Combine like terms: 80 + -80 = 0
0 + -6.28r = 0.00 + -80
-6.28r = 0.00 + -80

Combine like terms: 0.00 + -80 = -80
-6.28r = -80

Divide each side by '-6.28'.
r = 12.7388535

Simplifying
r = 12.7388535

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