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Simplifying 30 = -2r Solving 30 = -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. 30 + 2r = -2r + 2r Combine like terms: -2r + 2r = 0 30 + 2r = 0 Add '-30' to each side of the equation. 30 + -30 + 2r = 0 + -30 Combine like terms: 30 + -30 = 0 0 + 2r = 0 + -30 2r = 0 + -30 Combine like terms: 0 + -30 = -30 2r = -30 Divide each side by '2'. r = -15 Simplifying r = -15
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