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Simplifying 47.1 = 2(3.15) * r Multiply 2 * 3.15 47.1 = 6.3r Solving 47.1 = 6.3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6.3r' to each side of the equation. 47.1 + -6.3r = 6.3r + -6.3r Combine like terms: 6.3r + -6.3r = 0.0 47.1 + -6.3r = 0.0 Add '-47.1' to each side of the equation. 47.1 + -47.1 + -6.3r = 0.0 + -47.1 Combine like terms: 47.1 + -47.1 = 0.0 0.0 + -6.3r = 0.0 + -47.1 -6.3r = 0.0 + -47.1 Combine like terms: 0.0 + -47.1 = -47.1 -6.3r = -47.1 Divide each side by '-6.3'. r = 7.476190476 Simplifying r = 7.476190476
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