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Simplifying 300 = 600 + -500r Solving 300 = 600 + -500r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '500r' to each side of the equation. 300 + 500r = 600 + -500r + 500r Combine like terms: -500r + 500r = 0 300 + 500r = 600 + 0 300 + 500r = 600 Add '-300' to each side of the equation. 300 + -300 + 500r = 600 + -300 Combine like terms: 300 + -300 = 0 0 + 500r = 600 + -300 500r = 600 + -300 Combine like terms: 600 + -300 = 300 500r = 300 Divide each side by '500'. r = 0.6 Simplifying r = 0.6
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