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Simplifying -3 + 2r = -30 + -7r Solving -3 + 2r = -30 + -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. -3 + 2r + 7r = -30 + -7r + 7r Combine like terms: 2r + 7r = 9r -3 + 9r = -30 + -7r + 7r Combine like terms: -7r + 7r = 0 -3 + 9r = -30 + 0 -3 + 9r = -30 Add '3' to each side of the equation. -3 + 3 + 9r = -30 + 3 Combine like terms: -3 + 3 = 0 0 + 9r = -30 + 3 9r = -30 + 3 Combine like terms: -30 + 3 = -27 9r = -27 Divide each side by '9'. r = -3 Simplifying r = -3
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