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Simplifying r + 8 + 7r = 4r + -16 Reorder the terms: 8 + r + 7r = 4r + -16 Combine like terms: r + 7r = 8r 8 + 8r = 4r + -16 Reorder the terms: 8 + 8r = -16 + 4r Solving 8 + 8r = -16 + 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. 8 + 8r + -4r = -16 + 4r + -4r Combine like terms: 8r + -4r = 4r 8 + 4r = -16 + 4r + -4r Combine like terms: 4r + -4r = 0 8 + 4r = -16 + 0 8 + 4r = -16 Add '-8' to each side of the equation. 8 + -8 + 4r = -16 + -8 Combine like terms: 8 + -8 = 0 0 + 4r = -16 + -8 4r = -16 + -8 Combine like terms: -16 + -8 = -24 4r = -24 Divide each side by '4'. r = -6 Simplifying r = -6
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