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Simplifying 39 + -5t = 21 + t Solving 39 + -5t = 21 + t Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1t' to each side of the equation. 39 + -5t + -1t = 21 + t + -1t Combine like terms: -5t + -1t = -6t 39 + -6t = 21 + t + -1t Combine like terms: t + -1t = 0 39 + -6t = 21 + 0 39 + -6t = 21 Add '-39' to each side of the equation. 39 + -39 + -6t = 21 + -39 Combine like terms: 39 + -39 = 0 0 + -6t = 21 + -39 -6t = 21 + -39 Combine like terms: 21 + -39 = -18 -6t = -18 Divide each side by '-6'. t = 3 Simplifying t = 3
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