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Simplifying 120 = 2(3.14)(r)(4) Reorder the terms for easier multiplication: 120 = 2 * 3.14 * 4r Multiply 2 * 3.14 120 = 6.28 * 4r Multiply 6.28 * 4 120 = 25.12r Solving 120 = 25.12r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-25.12r' to each side of the equation. 120 + -25.12r = 25.12r + -25.12r Combine like terms: 25.12r + -25.12r = 0.00 120 + -25.12r = 0.00 Add '-120' to each side of the equation. 120 + -120 + -25.12r = 0.00 + -120 Combine like terms: 120 + -120 = 0 0 + -25.12r = 0.00 + -120 -25.12r = 0.00 + -120 Combine like terms: 0.00 + -120 = -120 -25.12r = -120 Divide each side by '-25.12'. r = 4.777070064 Simplifying r = 4.777070064
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