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Simplifying r + (4r + -30) = 35 Reorder the terms: r + (-30 + 4r) = 35 Remove parenthesis around (-30 + 4r) r + -30 + 4r = 35 Reorder the terms: -30 + r + 4r = 35 Combine like terms: r + 4r = 5r -30 + 5r = 35 Solving -30 + 5r = 35 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + 5r = 35 + 30 Combine like terms: -30 + 30 = 0 0 + 5r = 35 + 30 5r = 35 + 30 Combine like terms: 35 + 30 = 65 5r = 65 Divide each side by '5'. r = 13 Simplifying r = 13
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