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Simplifying 100r + 200 = 2000 Reorder the terms: 200 + 100r = 2000 Solving 200 + 100r = 2000 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-200' to each side of the equation. 200 + -200 + 100r = 2000 + -200 Combine like terms: 200 + -200 = 0 0 + 100r = 2000 + -200 100r = 2000 + -200 Combine like terms: 2000 + -200 = 1800 100r = 1800 Divide each side by '100'. r = 18 Simplifying r = 18
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