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Simplifying 6.4r + 7 + 2.9r = 0 Reorder the terms: 7 + 6.4r + 2.9r = 0 Combine like terms: 6.4r + 2.9r = 9.3r 7 + 9.3r = 0 Solving 7 + 9.3r = 0 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 + 9.3r = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 9.3r = 0 + -7 9.3r = 0 + -7 Combine like terms: 0 + -7 = -7 9.3r = -7 Divide each side by '9.3'. r = -0.752688172 Simplifying r = -0.752688172
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