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Simplifying 1400 = 8000(r)(3.5) Reorder the terms for easier multiplication: 1400 = 8000 * 3.5r Multiply 8000 * 3.5 1400 = 28000r Solving 1400 = 28000r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-28000r' to each side of the equation. 1400 + -28000r = 28000r + -28000r Combine like terms: 28000r + -28000r = 0 1400 + -28000r = 0 Add '-1400' to each side of the equation. 1400 + -1400 + -28000r = 0 + -1400 Combine like terms: 1400 + -1400 = 0 0 + -28000r = 0 + -1400 -28000r = 0 + -1400 Combine like terms: 0 + -1400 = -1400 -28000r = -1400 Divide each side by '-28000'. r = 0.05 Simplifying r = 0.05
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