4=2(3.14)r

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Solution for 4=2(3.14)r equation: 


Simplifying
4 = 2(3.14) * r

Multiply 2 * 3.14
4 = 6.28r

Solving
4 = 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.
4 + -6.28r = 6.28r + -6.28r

Combine like terms: 6.28r + -6.28r = 0.00
4 + -6.28r = 0.00

Add '-4' to each side of the equation.
4 + -4 + -6.28r = 0.00 + -4

Combine like terms: 4 + -4 = 0
0 + -6.28r = 0.00 + -4
-6.28r = 0.00 + -4

Combine like terms: 0.00 + -4 = -4
-6.28r = -4

Divide each side by '-6.28'.
r = 0.6369426752

Simplifying
r = 0.6369426752

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