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Simplifying -6(3 + -5r) = -18 + 2r (3 * -6 + -5r * -6) = -18 + 2r (-18 + 30r) = -18 + 2r Add '18' to each side of the equation. -18 + 18 + 30r = -18 + 18 + 2r Combine like terms: -18 + 18 = 0 0 + 30r = -18 + 18 + 2r 30r = -18 + 18 + 2r Combine like terms: -18 + 18 = 0 30r = 0 + 2r 30r = 2r Solving 30r = 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. 30r + -2r = 2r + -2r Combine like terms: 30r + -2r = 28r 28r = 2r + -2r Combine like terms: 2r + -2r = 0 28r = 0 Divide each side by '28'. r = 0 Simplifying r = 0
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