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Simplifying 84 = r + 28 Reorder the terms: 84 = 28 + r Solving 84 = 28 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. 84 + -1r = 28 + r + -1r Combine like terms: r + -1r = 0 84 + -1r = 28 + 0 84 + -1r = 28 Add '-84' to each side of the equation. 84 + -84 + -1r = 28 + -84 Combine like terms: 84 + -84 = 0 0 + -1r = 28 + -84 -1r = 28 + -84 Combine like terms: 28 + -84 = -56 -1r = -56 Divide each side by '-1'. r = 56 Simplifying r = 56
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