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Simplifying 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 = -35 -7r = -35 Divide each side by '-7'. r = 5 Simplifying r = 5
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