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Simplifying 8 + -1r = 2r + -91 Reorder the terms: 8 + -1r = -91 + 2r Solving 8 + -1r = -91 + 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 = -91 + 2r + -2r Combine like terms: -1r + -2r = -3r 8 + -3r = -91 + 2r + -2r Combine like terms: 2r + -2r = 0 8 + -3r = -91 + 0 8 + -3r = -91 Add '-8' to each side of the equation. 8 + -8 + -3r = -91 + -8 Combine like terms: 8 + -8 = 0 0 + -3r = -91 + -8 -3r = -91 + -8 Combine like terms: -91 + -8 = -99 -3r = -99 Divide each side by '-3'. r = 33 Simplifying r = 33
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