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Simplifying t(r + 4) = 28 Reorder the terms: t(4 + r) = 28 (4 * t + r * t) = 28 Reorder the terms: (rt + 4t) = 28 (rt + 4t) = 28 Solving rt + 4t = 28 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4t' to each side of the equation. rt + 4t + -4t = 28 + -4t Combine like terms: 4t + -4t = 0 rt + 0 = 28 + -4t rt = 28 + -4t Divide each side by 't'. r = 28t-1 + -4 Simplifying r = 28t-1 + -4 Reorder the terms: r = -4 + 28t-1
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