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Simplifying 63 = 7r + -28 Reorder the terms: 63 = -28 + 7r Solving 63 = -28 + 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. 63 + -7r = -28 + 7r + -7r Combine like terms: 7r + -7r = 0 63 + -7r = -28 + 0 63 + -7r = -28 Add '-63' to each side of the equation. 63 + -63 + -7r = -28 + -63 Combine like terms: 63 + -63 = 0 0 + -7r = -28 + -63 -7r = -28 + -63 Combine like terms: -28 + -63 = -91 -7r = -91 Divide each side by '-7'. r = 13 Simplifying r = 13
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