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Simplifying 84 = 2(-8r + 2) Reorder the terms: 84 = 2(2 + -8r) 84 = (2 * 2 + -8r * 2) 84 = (4 + -16r) Solving 84 = 4 + -16r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '16r' to each side of the equation. 84 + 16r = 4 + -16r + 16r Combine like terms: -16r + 16r = 0 84 + 16r = 4 + 0 84 + 16r = 4 Add '-84' to each side of the equation. 84 + -84 + 16r = 4 + -84 Combine like terms: 84 + -84 = 0 0 + 16r = 4 + -84 16r = 4 + -84 Combine like terms: 4 + -84 = -80 16r = -80 Divide each side by '16'. r = -5 Simplifying r = -5
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