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Simplifying -2 + -2(N + -3) + -3N = 21 + 7 Reorder the terms: -2 + -2(-3 + N) + -3N = 21 + 7 -2 + (-3 * -2 + N * -2) + -3N = 21 + 7 -2 + (6 + -2N) + -3N = 21 + 7 Combine like terms: -2 + 6 = 4 4 + -2N + -3N = 21 + 7 Combine like terms: -2N + -3N = -5N 4 + -5N = 21 + 7 Combine like terms: 21 + 7 = 28 4 + -5N = 28 Solving 4 + -5N = 28 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 + -5N = 28 + -4 Combine like terms: 4 + -4 = 0 0 + -5N = 28 + -4 -5N = 28 + -4 Combine like terms: 28 + -4 = 24 -5N = 24 Divide each side by '-5'. N = -4.8 Simplifying N = -4.8
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