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Simplifying 9r + -8 = 5r + 4 Reorder the terms: -8 + 9r = 5r + 4 Reorder the terms: -8 + 9r = 4 + 5r Solving -8 + 9r = 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. -8 + 9r + -5r = 4 + 5r + -5r Combine like terms: 9r + -5r = 4r -8 + 4r = 4 + 5r + -5r Combine like terms: 5r + -5r = 0 -8 + 4r = 4 + 0 -8 + 4r = 4 Add '8' to each side of the equation. -8 + 8 + 4r = 4 + 8 Combine like terms: -8 + 8 = 0 0 + 4r = 4 + 8 4r = 4 + 8 Combine like terms: 4 + 8 = 12 4r = 12 Divide each side by '4'. r = 3 Simplifying r = 3
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