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Simplifying -7r + 16 = -1r + -8r Reorder the terms: 16 + -7r = -1r + -8r Combine like terms: -1r + -8r = -9r 16 + -7r = -9r Solving 16 + -7r = -9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9r' to each side of the equation. 16 + -7r + 9r = -9r + 9r Combine like terms: -7r + 9r = 2r 16 + 2r = -9r + 9r Combine like terms: -9r + 9r = 0 16 + 2r = 0 Add '-16' to each side of the equation. 16 + -16 + 2r = 0 + -16 Combine like terms: 16 + -16 = 0 0 + 2r = 0 + -16 2r = 0 + -16 Combine like terms: 0 + -16 = -16 2r = -16 Divide each side by '2'. r = -8 Simplifying r = -8
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