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Simplifying 4252.5 = 1800 * 4.5r Multiply 1800 * 4.5 4252.5 = 8100r Solving 4252.5 = 8100r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8100r' to each side of the equation. 4252.5 + -8100r = 8100r + -8100r Combine like terms: 8100r + -8100r = 0 4252.5 + -8100r = 0 Add '-4252.5' to each side of the equation. 4252.5 + -4252.5 + -8100r = 0 + -4252.5 Combine like terms: 4252.5 + -4252.5 = 0.0 0.0 + -8100r = 0 + -4252.5 -8100r = 0 + -4252.5 Combine like terms: 0 + -4252.5 = -4252.5 -8100r = -4252.5 Divide each side by '-8100'. r = 0.525 Simplifying r = 0.525
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