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Simplifying -3r + 18 = 2(r + -1) Reorder the terms: 18 + -3r = 2(r + -1) Reorder the terms: 18 + -3r = 2(-1 + r) 18 + -3r = (-1 * 2 + r * 2) 18 + -3r = (-2 + 2r) Solving 18 + -3r = -2 + 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. 18 + -3r + -2r = -2 + 2r + -2r Combine like terms: -3r + -2r = -5r 18 + -5r = -2 + 2r + -2r Combine like terms: 2r + -2r = 0 18 + -5r = -2 + 0 18 + -5r = -2 Add '-18' to each side of the equation. 18 + -18 + -5r = -2 + -18 Combine like terms: 18 + -18 = 0 0 + -5r = -2 + -18 -5r = -2 + -18 Combine like terms: -2 + -18 = -20 -5r = -20 Divide each side by '-5'. r = 4 Simplifying r = 4
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