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Simplifying 84 = 4r + -16 Reorder the terms: 84 = -16 + 4r Solving 84 = -16 + 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. 84 + -4r = -16 + 4r + -4r Combine like terms: 4r + -4r = 0 84 + -4r = -16 + 0 84 + -4r = -16 Add '-84' to each side of the equation. 84 + -84 + -4r = -16 + -84 Combine like terms: 84 + -84 = 0 0 + -4r = -16 + -84 -4r = -16 + -84 Combine like terms: -16 + -84 = -100 -4r = -100 Divide each side by '-4'. r = 25 Simplifying r = 25
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