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Simplifying 21 + -2n = -7(8n + 3) Reorder the terms: 21 + -2n = -7(3 + 8n) 21 + -2n = (3 * -7 + 8n * -7) 21 + -2n = (-21 + -56n) Solving 21 + -2n = -21 + -56n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '56n' to each side of the equation. 21 + -2n + 56n = -21 + -56n + 56n Combine like terms: -2n + 56n = 54n 21 + 54n = -21 + -56n + 56n Combine like terms: -56n + 56n = 0 21 + 54n = -21 + 0 21 + 54n = -21 Add '-21' to each side of the equation. 21 + -21 + 54n = -21 + -21 Combine like terms: 21 + -21 = 0 0 + 54n = -21 + -21 54n = -21 + -21 Combine like terms: -21 + -21 = -42 54n = -42 Divide each side by '54'. n = -0.7777777778 Simplifying n = -0.7777777778
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