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Simplifying 15 = 2(3.14) * R Multiply 2 * 3.14 15 = 6.28R Solving 15 = 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. 15 + -6.28R = 6.28R + -6.28R Combine like terms: 6.28R + -6.28R = 0.00 15 + -6.28R = 0.00 Add '-15' to each side of the equation. 15 + -15 + -6.28R = 0.00 + -15 Combine like terms: 15 + -15 = 0 0 + -6.28R = 0.00 + -15 -6.28R = 0.00 + -15 Combine like terms: 0.00 + -15 = -15 -6.28R = -15 Divide each side by '-6.28'. R = 2.388535032 Simplifying R = 2.388535032
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