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Simplifying 8t + -21 = 5t Reorder the terms: -21 + 8t = 5t Solving -21 + 8t = 5t Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-5t' to each side of the equation. -21 + 8t + -5t = 5t + -5t Combine like terms: 8t + -5t = 3t -21 + 3t = 5t + -5t Combine like terms: 5t + -5t = 0 -21 + 3t = 0 Add '21' to each side of the equation. -21 + 21 + 3t = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 3t = 0 + 21 3t = 0 + 21 Combine like terms: 0 + 21 = 21 3t = 21 Divide each side by '3'. t = 7 Simplifying t = 7
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