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Simplifying 7r + -12 = -18 + -3r Reorder the terms: -12 + 7r = -18 + -3r Solving -12 + 7r = -18 + -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. -12 + 7r + 3r = -18 + -3r + 3r Combine like terms: 7r + 3r = 10r -12 + 10r = -18 + -3r + 3r Combine like terms: -3r + 3r = 0 -12 + 10r = -18 + 0 -12 + 10r = -18 Add '12' to each side of the equation. -12 + 12 + 10r = -18 + 12 Combine like terms: -12 + 12 = 0 0 + 10r = -18 + 12 10r = -18 + 12 Combine like terms: -18 + 12 = -6 10r = -6 Divide each side by '10'. r = -0.6 Simplifying r = -0.6
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