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Simplifying -4r + 5 = -25 Reorder the terms: 5 + -4r = -25 Solving 5 + -4r = -25 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4r = -25 + -5 Combine like terms: 5 + -5 = 0 0 + -4r = -25 + -5 -4r = -25 + -5 Combine like terms: -25 + -5 = -30 -4r = -30 Divide each side by '-4'. r = 7.5 Simplifying r = 7.5
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