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Simplifying 53.4 = 2(3.14) * r Multiply 2 * 3.14 53.4 = 6.28r Solving 53.4 = 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. 53.4 + -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 53.4 + -6.28r = 0.00 Add '-53.4' to each side of the equation. 53.4 + -53.4 + -6.28r = 0.00 + -53.4 Combine like terms: 53.4 + -53.4 = 0.0 0.0 + -6.28r = 0.00 + -53.4 -6.28r = 0.00 + -53.4 Combine like terms: 0.00 + -53.4 = -53.4 -6.28r = -53.4 Divide each side by '-6.28'. r = 8.503184713 Simplifying r = 8.503184713
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