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Simplifying 50(r + -1) = 30r Reorder the terms: 50(-1 + r) = 30r (-1 * 50 + r * 50) = 30r (-50 + 50r) = 30r Solving -50 + 50r = 30r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-30r' to each side of the equation. -50 + 50r + -30r = 30r + -30r Combine like terms: 50r + -30r = 20r -50 + 20r = 30r + -30r Combine like terms: 30r + -30r = 0 -50 + 20r = 0 Add '50' to each side of the equation. -50 + 50 + 20r = 0 + 50 Combine like terms: -50 + 50 = 0 0 + 20r = 0 + 50 20r = 0 + 50 Combine like terms: 0 + 50 = 50 20r = 50 Divide each side by '20'. r = 2.5 Simplifying r = 2.5
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