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Simplifying -8 + -3(r + -1) = 2r Reorder the terms: -8 + -3(-1 + r) = 2r -8 + (-1 * -3 + r * -3) = 2r -8 + (3 + -3r) = 2r Combine like terms: -8 + 3 = -5 -5 + -3r = 2r Solving -5 + -3r = 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. -5 + -3r + -2r = 2r + -2r Combine like terms: -3r + -2r = -5r -5 + -5r = 2r + -2r Combine like terms: 2r + -2r = 0 -5 + -5r = 0 Add '5' to each side of the equation. -5 + 5 + -5r = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -5r = 0 + 5 -5r = 0 + 5 Combine like terms: 0 + 5 = 5 -5r = 5 Divide each side by '-5'. r = -1 Simplifying r = -1
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