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Simplifying -13 = -4r + 50 + 0.5 Reorder the terms: -13 = 50 + 0.5 + -4r Combine like terms: 50 + 0.5 = 50.5 -13 = 50.5 + -4r Solving -13 = 50.5 + -4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4r' to each side of the equation. -13 + 4r = 50.5 + -4r + 4r Combine like terms: -4r + 4r = 0 -13 + 4r = 50.5 + 0 -13 + 4r = 50.5 Add '13' to each side of the equation. -13 + 13 + 4r = 50.5 + 13 Combine like terms: -13 + 13 = 0 0 + 4r = 50.5 + 13 4r = 50.5 + 13 Combine like terms: 50.5 + 13 = 63.5 4r = 63.5 Divide each side by '4'. r = 15.875 Simplifying r = 15.875
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