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Simplifying 420 = 2000r(3.5) Reorder the terms for easier multiplication: 420 = 2000 * 3.5r Multiply 2000 * 3.5 420 = 7000r Solving 420 = 7000r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7000r' to each side of the equation. 420 + -7000r = 7000r + -7000r Combine like terms: 7000r + -7000r = 0 420 + -7000r = 0 Add '-420' to each side of the equation. 420 + -420 + -7000r = 0 + -420 Combine like terms: 420 + -420 = 0 0 + -7000r = 0 + -420 -7000r = 0 + -420 Combine like terms: 0 + -420 = -420 -7000r = -420 Divide each side by '-7000'. r = 0.06 Simplifying r = 0.06
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