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Simplifying 3[2n + 1] + -7 = 20 Reorder the terms: 3[1 + 2n] + -7 = 20 [1 * 3 + 2n * 3] + -7 = 20 [3 + 6n] + -7 = 20 Reorder the terms: 3 + -7 + 6n = 20 Combine like terms: 3 + -7 = -4 -4 + 6n = 20 Solving -4 + 6n = 20 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 6n = 20 + 4 Combine like terms: -4 + 4 = 0 0 + 6n = 20 + 4 6n = 20 + 4 Combine like terms: 20 + 4 = 24 6n = 24 Divide each side by '6'. n = 4 Simplifying n = 4
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