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Simplifying 5 = 4 + -8r + -7 Reorder the terms: 5 = 4 + -7 + -8r Combine like terms: 4 + -7 = -3 5 = -3 + -8r Solving 5 = -3 + -8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '8r' to each side of the equation. 5 + 8r = -3 + -8r + 8r Combine like terms: -8r + 8r = 0 5 + 8r = -3 + 0 5 + 8r = -3 Add '-5' to each side of the equation. 5 + -5 + 8r = -3 + -5 Combine like terms: 5 + -5 = 0 0 + 8r = -3 + -5 8r = -3 + -5 Combine like terms: -3 + -5 = -8 8r = -8 Divide each side by '8'. r = -1 Simplifying r = -1
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