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Simplifying 4r + (7 * 4) = 72 Multiply 7 * 4 4r + (28) = 72 4r + 28 = 72 Reorder the terms: 28 + 4r = 72 Solving 28 + 4r = 72 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 4r = 72 + -28 Combine like terms: 28 + -28 = 0 0 + 4r = 72 + -28 4r = 72 + -28 Combine like terms: 72 + -28 = 44 4r = 44 Divide each side by '4'. r = 11 Simplifying r = 11
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