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Simplifying 8r + -5r + 4 = 6r + -1r Reorder the terms: 4 + 8r + -5r = 6r + -1r Combine like terms: 8r + -5r = 3r 4 + 3r = 6r + -1r Combine like terms: 6r + -1r = 5r 4 + 3r = 5r Solving 4 + 3r = 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. 4 + 3r + -5r = 5r + -5r Combine like terms: 3r + -5r = -2r 4 + -2r = 5r + -5r Combine like terms: 5r + -5r = 0 4 + -2r = 0 Add '-4' to each side of the equation. 4 + -4 + -2r = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -2r = 0 + -4 -2r = 0 + -4 Combine like terms: 0 + -4 = -4 -2r = -4 Divide each side by '-2'. r = 2 Simplifying r = 2
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