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Simplifying
159.3864 = 2 * 3.14r2
Multiply 2 * 3.14
159.3864 = 6.28r2
Solving
159.3864 = 6.28r2
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-6.28r2' to each side of the equation.
159.3864 + -6.28r2 = 6.28r2 + -6.28r2
Combine like terms: 6.28r2 + -6.28r2 = 0.00
159.3864 + -6.28r2 = 0.00
Add '-159.3864' to each side of the equation.
159.3864 + -159.3864 + -6.28r2 = 0.00 + -159.3864
Combine like terms: 159.3864 + -159.3864 = 0.0000
0.0000 + -6.28r2 = 0.00 + -159.3864
-6.28r2 = 0.00 + -159.3864
Combine like terms: 0.00 + -159.3864 = -159.3864
-6.28r2 = -159.3864
Divide each side by '-6.28'.
r2 = 25.38
Simplifying
r2 = 25.38
Take the square root of each side:
r = {-5.037856687, 5.037856687}
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