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Simplifying -1.25r + -3.5 = -13.5 Reorder the terms: -3.5 + -1.25r = -13.5 Solving -3.5 + -1.25r = -13.5 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + -1.25r = -13.5 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + -1.25r = -13.5 + 3.5 -1.25r = -13.5 + 3.5 Combine like terms: -13.5 + 3.5 = -10 -1.25r = -10 Divide each side by '-1.25'. r = 8 Simplifying r = 8
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