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Simplifying 9r + 2r + -7 = 68 Reorder the terms: -7 + 9r + 2r = 68 Combine like terms: 9r + 2r = 11r -7 + 11r = 68 Solving -7 + 11r = 68 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 11r = 68 + 7 Combine like terms: -7 + 7 = 0 0 + 11r = 68 + 7 11r = 68 + 7 Combine like terms: 68 + 7 = 75 11r = 75 Divide each side by '11'. r = 6.818181818 Simplifying r = 6.818181818
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