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Simplifying 8r + 5r + 4r + -7 = 0 Reorder the terms: -7 + 8r + 5r + 4r = 0 Combine like terms: 8r + 5r = 13r -7 + 13r + 4r = 0 Combine like terms: 13r + 4r = 17r -7 + 17r = 0 Solving -7 + 17r = 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 + 17r = 0 + 7 Combine like terms: -7 + 7 = 0 0 + 17r = 0 + 7 17r = 0 + 7 Combine like terms: 0 + 7 = 7 17r = 7 Divide each side by '17'. r = 0.4117647059 Simplifying r = 0.4117647059
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