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Simplifying 2(r + -5) + -3 = -1 Reorder the terms: 2(-5 + r) + -3 = -1 (-5 * 2 + r * 2) + -3 = -1 (-10 + 2r) + -3 = -1 Reorder the terms: -10 + -3 + 2r = -1 Combine like terms: -10 + -3 = -13 -13 + 2r = -1 Solving -13 + 2r = -1 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + 2r = -1 + 13 Combine like terms: -13 + 13 = 0 0 + 2r = -1 + 13 2r = -1 + 13 Combine like terms: -1 + 13 = 12 2r = 12 Divide each side by '2'. r = 6 Simplifying r = 6
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