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Simplifying 9t + -21 = 5t Reorder the terms: -21 + 9t = 5t Solving -21 + 9t = 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 + 9t + -5t = 5t + -5t Combine like terms: 9t + -5t = 4t -21 + 4t = 5t + -5t Combine like terms: 5t + -5t = 0 -21 + 4t = 0 Add '21' to each side of the equation. -21 + 21 + 4t = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 4t = 0 + 21 4t = 0 + 21 Combine like terms: 0 + 21 = 21 4t = 21 Divide each side by '4'. t = 5.25 Simplifying t = 5.25
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