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Simplifying -7(3 + t) = 4(2t + 7) (3 * -7 + t * -7) = 4(2t + 7) (-21 + -7t) = 4(2t + 7) Reorder the terms: -21 + -7t = 4(7 + 2t) -21 + -7t = (7 * 4 + 2t * 4) -21 + -7t = (28 + 8t) Solving -21 + -7t = 28 + 8t Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-8t' to each side of the equation. -21 + -7t + -8t = 28 + 8t + -8t Combine like terms: -7t + -8t = -15t -21 + -15t = 28 + 8t + -8t Combine like terms: 8t + -8t = 0 -21 + -15t = 28 + 0 -21 + -15t = 28 Add '21' to each side of the equation. -21 + 21 + -15t = 28 + 21 Combine like terms: -21 + 21 = 0 0 + -15t = 28 + 21 -15t = 28 + 21 Combine like terms: 28 + 21 = 49 -15t = 49 Divide each side by '-15'. t = -3.266666667 Simplifying t = -3.266666667
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