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Simplifying -16 = 4(2 + -2r) -16 = (2 * 4 + -2r * 4) -16 = (8 + -8r) Solving -16 = 8 + -8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '8r' to each side of the equation. -16 + 8r = 8 + -8r + 8r Combine like terms: -8r + 8r = 0 -16 + 8r = 8 + 0 -16 + 8r = 8 Add '16' to each side of the equation. -16 + 16 + 8r = 8 + 16 Combine like terms: -16 + 16 = 0 0 + 8r = 8 + 16 8r = 8 + 16 Combine like terms: 8 + 16 = 24 8r = 24 Divide each side by '8'. r = 3 Simplifying r = 3
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