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Simplifying 7 + -4(4n + 3) = -123 Reorder the terms: 7 + -4(3 + 4n) = -123 7 + (3 * -4 + 4n * -4) = -123 7 + (-12 + -16n) = -123 Combine like terms: 7 + -12 = -5 -5 + -16n = -123 Solving -5 + -16n = -123 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -16n = -123 + 5 Combine like terms: -5 + 5 = 0 0 + -16n = -123 + 5 -16n = -123 + 5 Combine like terms: -123 + 5 = -118 -16n = -118 Divide each side by '-16'. n = 7.375 Simplifying n = 7.375
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