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Simplifying 8 = r + 3 + 4r Reorder the terms: 8 = 3 + r + 4r Combine like terms: r + 4r = 5r 8 = 3 + 5r Solving 8 = 3 + 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 + -5r = 3 + 5r + -5r Combine like terms: 5r + -5r = 0 8 + -5r = 3 + 0 8 + -5r = 3 Add '-8' to each side of the equation. 8 + -8 + -5r = 3 + -8 Combine like terms: 8 + -8 = 0 0 + -5r = 3 + -8 -5r = 3 + -8 Combine like terms: 3 + -8 = -5 -5r = -5 Divide each side by '-5'. r = 1 Simplifying r = 1
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