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Simplifying 140 = 3.14r * 10 Reorder the terms for easier multiplication: 140 = 3.14 * 10r Multiply 3.14 * 10 140 = 31.4r Solving 140 = 31.4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-31.4r' to each side of the equation. 140 + -31.4r = 31.4r + -31.4r Combine like terms: 31.4r + -31.4r = 0.0 140 + -31.4r = 0.0 Add '-140' to each side of the equation. 140 + -140 + -31.4r = 0.0 + -140 Combine like terms: 140 + -140 = 0 0 + -31.4r = 0.0 + -140 -31.4r = 0.0 + -140 Combine like terms: 0.0 + -140 = -140 -31.4r = -140 Divide each side by '-31.4'. r = 4.458598726 Simplifying r = 4.458598726
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