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Simplifying 31 = 5r + -4 Reorder the terms: 31 = -4 + 5r Solving 31 = -4 + 5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r' to each side of the equation. 31 + -5r = -4 + 5r + -5r Combine like terms: 5r + -5r = 0 31 + -5r = -4 + 0 31 + -5r = -4 Add '-31' to each side of the equation. 31 + -31 + -5r = -4 + -31 Combine like terms: 31 + -31 = 0 0 + -5r = -4 + -31 -5r = -4 + -31 Combine like terms: -4 + -31 = -35 -5r = -35 Divide each side by '-5'. r = 7 Simplifying r = 7
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