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Simplifying (N + 4)(n + 4 + -7) = 18 Reorder the terms: (4 + N)(n + 4 + -7) = 18 Reorder the terms: (4 + N)(4 + -7 + n) = 18 Combine like terms: 4 + -7 = -3 (4 + N)(-3 + n) = 18 Multiply (4 + N) * (-3 + n) (4(-3 + n) + N(-3 + n)) = 18 ((-3 * 4 + n * 4) + N(-3 + n)) = 18 ((-12 + 4n) + N(-3 + n)) = 18 (-12 + 4n + (-3 * N + n * N)) = 18 (-12 + 4n + (-3N + nN)) = 18 Reorder the terms: (-12 + -3N + 4n + nN) = 18 (-12 + -3N + 4n + nN) = 18 Solving -12 + -3N + 4n + nN = 18 Solving for variable 'N'. Move all terms containing N to the left, all other terms to the right. Add '12' to each side of the equation. -12 + -3N + 4n + 12 + nN = 18 + 12 Reorder the terms: -12 + 12 + -3N + 4n + nN = 18 + 12 Combine like terms: -12 + 12 = 0 0 + -3N + 4n + nN = 18 + 12 -3N + 4n + nN = 18 + 12 Combine like terms: 18 + 12 = 30 -3N + 4n + nN = 30 Add '-4n' to each side of the equation. -3N + 4n + -4n + nN = 30 + -4n Combine like terms: 4n + -4n = 0 -3N + 0 + nN = 30 + -4n -3N + nN = 30 + -4n Reorder the terms: -30 + -3N + 4n + nN = 30 + -4n + -30 + 4n Reorder the terms: -30 + -3N + 4n + nN = 30 + -30 + -4n + 4n Combine like terms: 30 + -30 = 0 -30 + -3N + 4n + nN = 0 + -4n + 4n -30 + -3N + 4n + nN = -4n + 4n Combine like terms: -4n + 4n = 0 -30 + -3N + 4n + nN = 0 The solution to this equation could not be determined.
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