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Simplifying 5t + -1 = 20 Reorder the terms: -1 + 5t = 20 Solving -1 + 5t = 20 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 5t = 20 + 1 Combine like terms: -1 + 1 = 0 0 + 5t = 20 + 1 5t = 20 + 1 Combine like terms: 20 + 1 = 21 5t = 21 Divide each side by '5'. t = 4.2 Simplifying t = 4.2

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