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Simplifying -16 = 4r + -4 Reorder the terms: -16 = -4 + 4r Solving -16 = -4 + 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. -16 + -4r = -4 + 4r + -4r Combine like terms: 4r + -4r = 0 -16 + -4r = -4 + 0 -16 + -4r = -4 Add '16' to each side of the equation. -16 + 16 + -4r = -4 + 16 Combine like terms: -16 + 16 = 0 0 + -4r = -4 + 16 -4r = -4 + 16 Combine like terms: -4 + 16 = 12 -4r = 12 Divide each side by '-4'. r = -3 Simplifying r = -3
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