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Simplifying -130 = -2(1 + -8r) -130 = (1 * -2 + -8r * -2) -130 = (-2 + 16r) Solving -130 = -2 + 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. -130 + -16r = -2 + 16r + -16r Combine like terms: 16r + -16r = 0 -130 + -16r = -2 + 0 -130 + -16r = -2 Add '130' to each side of the equation. -130 + 130 + -16r = -2 + 130 Combine like terms: -130 + 130 = 0 0 + -16r = -2 + 130 -16r = -2 + 130 Combine like terms: -2 + 130 = 128 -16r = 128 Divide each side by '-16'. r = -8 Simplifying r = -8
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