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Simplifying -33 = -2(r + 6) Reorder the terms: -33 = -2(6 + r) -33 = (6 * -2 + r * -2) -33 = (-12 + -2r) Solving -33 = -12 + -2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2r' to each side of the equation. -33 + 2r = -12 + -2r + 2r Combine like terms: -2r + 2r = 0 -33 + 2r = -12 + 0 -33 + 2r = -12 Add '33' to each side of the equation. -33 + 33 + 2r = -12 + 33 Combine like terms: -33 + 33 = 0 0 + 2r = -12 + 33 2r = -12 + 33 Combine like terms: -12 + 33 = 21 2r = 21 Divide each side by '2'. r = 10.5 Simplifying r = 10.5
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