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Simplifying 28 = 7r + 7 Reorder the terms: 28 = 7 + 7r Solving 28 = 7 + 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. 28 + -7r = 7 + 7r + -7r Combine like terms: 7r + -7r = 0 28 + -7r = 7 + 0 28 + -7r = 7 Add '-28' to each side of the equation. 28 + -28 + -7r = 7 + -28 Combine like terms: 28 + -28 = 0 0 + -7r = 7 + -28 -7r = 7 + -28 Combine like terms: 7 + -28 = -21 -7r = -21 Divide each side by '-7'. r = 3 Simplifying r = 3
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