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Simplifying -7r + -3 + 2r + -1 + -1 = 13 + 17 Reorder the terms: -3 + -1 + -1 + -7r + 2r = 13 + 17 Combine like terms: -3 + -1 = -4 -4 + -1 + -7r + 2r = 13 + 17 Combine like terms: -4 + -1 = -5 -5 + -7r + 2r = 13 + 17 Combine like terms: -7r + 2r = -5r -5 + -5r = 13 + 17 Combine like terms: 13 + 17 = 30 -5 + -5r = 30 Solving -5 + -5r = 30 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -5r = 30 + 5 Combine like terms: -5 + 5 = 0 0 + -5r = 30 + 5 -5r = 30 + 5 Combine like terms: 30 + 5 = 35 -5r = 35 Divide each side by '-5'. r = -7 Simplifying r = -7
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