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Simplifying 4r + -4 = -18 + 2r Reorder the terms: -4 + 4r = -18 + 2r Solving -4 + 4r = -18 + 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. -4 + 4r + -2r = -18 + 2r + -2r Combine like terms: 4r + -2r = 2r -4 + 2r = -18 + 2r + -2r Combine like terms: 2r + -2r = 0 -4 + 2r = -18 + 0 -4 + 2r = -18 Add '4' to each side of the equation. -4 + 4 + 2r = -18 + 4 Combine like terms: -4 + 4 = 0 0 + 2r = -18 + 4 2r = -18 + 4 Combine like terms: -18 + 4 = -14 2r = -14 Divide each side by '2'. r = -7 Simplifying r = -7
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