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Simplifying r + -2 = 6 + -3r + -18 Reorder the terms: -2 + r = 6 + -3r + -18 Reorder the terms: -2 + r = 6 + -18 + -3r Combine like terms: 6 + -18 = -12 -2 + r = -12 + -3r Solving -2 + r = -12 + -3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3r' to each side of the equation. -2 + r + 3r = -12 + -3r + 3r Combine like terms: r + 3r = 4r -2 + 4r = -12 + -3r + 3r Combine like terms: -3r + 3r = 0 -2 + 4r = -12 + 0 -2 + 4r = -12 Add '2' to each side of the equation. -2 + 2 + 4r = -12 + 2 Combine like terms: -2 + 2 = 0 0 + 4r = -12 + 2 4r = -12 + 2 Combine like terms: -12 + 2 = -10 4r = -10 Divide each side by '4'. r = -2.5 Simplifying r = -2.5
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