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Simplifying 7 + -7r = 2r + 18 Reorder the terms: 7 + -7r = 18 + 2r Solving 7 + -7r = 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. 7 + -7r + -2r = 18 + 2r + -2r Combine like terms: -7r + -2r = -9r 7 + -9r = 18 + 2r + -2r Combine like terms: 2r + -2r = 0 7 + -9r = 18 + 0 7 + -9r = 18 Add '-7' to each side of the equation. 7 + -7 + -9r = 18 + -7 Combine like terms: 7 + -7 = 0 0 + -9r = 18 + -7 -9r = 18 + -7 Combine like terms: 18 + -7 = 11 -9r = 11 Divide each side by '-9'. r = -1.222222222 Simplifying r = -1.222222222
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