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Simplifying 22 = (2 * 3.14) * r Multiply 2 * 3.14 22 = (6.28) * r Solving 22 = 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. 22 + -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 22 + -6.28r = 0.00 Add '-22' to each side of the equation. 22 + -22 + -6.28r = 0.00 + -22 Combine like terms: 22 + -22 = 0 0 + -6.28r = 0.00 + -22 -6.28r = 0.00 + -22 Combine like terms: 0.00 + -22 = -22 -6.28r = -22 Divide each side by '-6.28'. r = 3.503184713 Simplifying r = 3.503184713
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