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Simplifying 20 = 6 + -7r Solving 20 = 6 + -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. 20 + 7r = 6 + -7r + 7r Combine like terms: -7r + 7r = 0 20 + 7r = 6 + 0 20 + 7r = 6 Add '-20' to each side of the equation. 20 + -20 + 7r = 6 + -20 Combine like terms: 20 + -20 = 0 0 + 7r = 6 + -20 7r = 6 + -20 Combine like terms: 6 + -20 = -14 7r = -14 Divide each side by '7'. r = -2 Simplifying r = -2
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