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Simplifying 6r + -2.9 + -8.1r + 2.8r + -2 = 0 Reorder the terms: -2.9 + -2 + 6r + -8.1r + 2.8r = 0 Combine like terms: -2.9 + -2 = -4.9 -4.9 + 6r + -8.1r + 2.8r = 0 Combine like terms: 6r + -8.1r = -2.1r -4.9 + -2.1r + 2.8r = 0 Combine like terms: -2.1r + 2.8r = 0.7r -4.9 + 0.7r = 0 Solving -4.9 + 0.7r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4.9' to each side of the equation. -4.9 + 4.9 + 0.7r = 0 + 4.9 Combine like terms: -4.9 + 4.9 = 0.0 0.0 + 0.7r = 0 + 4.9 0.7r = 0 + 4.9 Combine like terms: 0 + 4.9 = 4.9 0.7r = 4.9 Divide each side by '0.7'. r = 7 Simplifying r = 7
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