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Simplifying 7r + 9r + 2r + -2 = 0 Reorder the terms: -2 + 7r + 9r + 2r = 0 Combine like terms: 7r + 9r = 16r -2 + 16r + 2r = 0 Combine like terms: 16r + 2r = 18r -2 + 18r = 0 Solving -2 + 18r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + 18r = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 18r = 0 + 2 18r = 0 + 2 Combine like terms: 0 + 2 = 2 18r = 2 Divide each side by '18'. r = 0.1111111111 Simplifying r = 0.1111111111
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