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Simplifying 7r + -18 = 7 + 2r Reorder the terms: -18 + 7r = 7 + 2r Solving -18 + 7r = 7 + 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 + 7r + -2r = 7 + 2r + -2r Combine like terms: 7r + -2r = 5r -18 + 5r = 7 + 2r + -2r Combine like terms: 2r + -2r = 0 -18 + 5r = 7 + 0 -18 + 5r = 7 Add '18' to each side of the equation. -18 + 18 + 5r = 7 + 18 Combine like terms: -18 + 18 = 0 0 + 5r = 7 + 18 5r = 7 + 18 Combine like terms: 7 + 18 = 25 5r = 25 Divide each side by '5'. r = 5 Simplifying r = 5
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