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Simplifying 90 = 1500r * 2 Reorder the terms for easier multiplication: 90 = 1500 * 2r Multiply 1500 * 2 90 = 3000r Solving 90 = 3000r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3000r' to each side of the equation. 90 + -3000r = 3000r + -3000r Combine like terms: 3000r + -3000r = 0 90 + -3000r = 0 Add '-90' to each side of the equation. 90 + -90 + -3000r = 0 + -90 Combine like terms: 90 + -90 = 0 0 + -3000r = 0 + -90 -3000r = 0 + -90 Combine like terms: 0 + -90 = -90 -3000r = -90 Divide each side by '-3000'. r = 0.03 Simplifying r = 0.03
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