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Simplifying 5r + -12 = -4r + -30 Reorder the terms: -12 + 5r = -4r + -30 Reorder the terms: -12 + 5r = -30 + -4r Solving -12 + 5r = -30 + -4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4r' to each side of the equation. -12 + 5r + 4r = -30 + -4r + 4r Combine like terms: 5r + 4r = 9r -12 + 9r = -30 + -4r + 4r Combine like terms: -4r + 4r = 0 -12 + 9r = -30 + 0 -12 + 9r = -30 Add '12' to each side of the equation. -12 + 12 + 9r = -30 + 12 Combine like terms: -12 + 12 = 0 0 + 9r = -30 + 12 9r = -30 + 12 Combine like terms: -30 + 12 = -18 9r = -18 Divide each side by '9'. r = -2 Simplifying r = -2
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