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Simplifying 8r + -16 = 4r + 4 Reorder the terms: -16 + 8r = 4r + 4 Reorder the terms: -16 + 8r = 4 + 4r Solving -16 + 8r = 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 + 8r + -4r = 4 + 4r + -4r Combine like terms: 8r + -4r = 4r -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 = 20 4r = 20 Divide each side by '4'. r = 5 Simplifying r = 5
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