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Simplifying r + -4 + 6r = 8r Reorder the terms: -4 + r + 6r = 8r Combine like terms: r + 6r = 7r -4 + 7r = 8r Solving -4 + 7r = 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. -4 + 7r + -8r = 8r + -8r Combine like terms: 7r + -8r = -1r -4 + -1r = 8r + -8r Combine like terms: 8r + -8r = 0 -4 + -1r = 0 Add '4' to each side of the equation. -4 + 4 + -1r = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1r = 0 + 4 -1r = 0 + 4 Combine like terms: 0 + 4 = 4 -1r = 4 Divide each side by '-1'. r = -4 Simplifying r = -4
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