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Simplifying r + -6.9 + -1.8r = -10.18 Reorder the terms: -6.9 + r + -1.8r = -10.18 Combine like terms: r + -1.8r = -0.8r -6.9 + -0.8r = -10.18 Solving -6.9 + -0.8r = -10.18 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '6.9' to each side of the equation. -6.9 + 6.9 + -0.8r = -10.18 + 6.9 Combine like terms: -6.9 + 6.9 = 0.0 0.0 + -0.8r = -10.18 + 6.9 -0.8r = -10.18 + 6.9 Combine like terms: -10.18 + 6.9 = -3.28 -0.8r = -3.28 Divide each side by '-0.8'. r = 4.1 Simplifying r = 4.1
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