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Simplifying 21t + -18 = 12 + -6t Reorder the terms: -18 + 21t = 12 + -6t Solving -18 + 21t = 12 + -6t Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '6t' to each side of the equation. -18 + 21t + 6t = 12 + -6t + 6t Combine like terms: 21t + 6t = 27t -18 + 27t = 12 + -6t + 6t Combine like terms: -6t + 6t = 0 -18 + 27t = 12 + 0 -18 + 27t = 12 Add '18' to each side of the equation. -18 + 18 + 27t = 12 + 18 Combine like terms: -18 + 18 = 0 0 + 27t = 12 + 18 27t = 12 + 18 Combine like terms: 12 + 18 = 30 27t = 30 Divide each side by '27'. t = 1.111111111 Simplifying t = 1.111111111
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