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Simplifying 7t + -21 = 19 + 5t Reorder the terms: -21 + 7t = 19 + 5t Solving -21 + 7t = 19 + 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 + 7t + -5t = 19 + 5t + -5t Combine like terms: 7t + -5t = 2t -21 + 2t = 19 + 5t + -5t Combine like terms: 5t + -5t = 0 -21 + 2t = 19 + 0 -21 + 2t = 19 Add '21' to each side of the equation. -21 + 21 + 2t = 19 + 21 Combine like terms: -21 + 21 = 0 0 + 2t = 19 + 21 2t = 19 + 21 Combine like terms: 19 + 21 = 40 2t = 40 Divide each side by '2'. t = 20 Simplifying t = 20
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