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Simplifying -3(2t + 3) = -21 Reorder the terms: -3(3 + 2t) = -21 (3 * -3 + 2t * -3) = -21 (-9 + -6t) = -21 Solving -9 + -6t = -21 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -6t = -21 + 9 Combine like terms: -9 + 9 = 0 0 + -6t = -21 + 9 -6t = -21 + 9 Combine like terms: -21 + 9 = -12 -6t = -12 Divide each side by '-6'. t = 2 Simplifying t = 2
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