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Simplifying 8 + -1r = -2r Solving 8 + -1r = -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. 8 + -1r + 2r = -2r + 2r Combine like terms: -1r + 2r = 1r 8 + 1r = -2r + 2r Combine like terms: -2r + 2r = 0 8 + 1r = 0 Add '-8' to each side of the equation. 8 + -8 + 1r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 1r = 0 + -8 1r = 0 + -8 Combine like terms: 0 + -8 = -8 1r = -8 Divide each side by '1'. r = -8 Simplifying r = -8
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