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Simplifying 13r + 16r + -18 = 0 Reorder the terms: -18 + 13r + 16r = 0 Combine like terms: 13r + 16r = 29r -18 + 29r = 0 Solving -18 + 29r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 29r = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 29r = 0 + 18 29r = 0 + 18 Combine like terms: 0 + 18 = 18 29r = 18 Divide each side by '29'. r = 0.6206896552 Simplifying r = 0.6206896552
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