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Simplifying -4 = -7n + -4(1 + -2n) -4 = -7n + (1 * -4 + -2n * -4) -4 = -7n + (-4 + 8n) Reorder the terms: -4 = -4 + -7n + 8n Combine like terms: -7n + 8n = 1n -4 = -4 + 1n Add '4' to each side of the equation. -4 + 4 = -4 + 4 + 1n Combine like terms: -4 + 4 = 0 0 = -4 + 4 + 1n Combine like terms: -4 + 4 = 0 0 = 0 + 1n 0 = 1n Solving 0 = 1n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. 0 + -1n = 1n + -1n Remove the zero: -1n = 1n + -1n Combine like terms: 1n + -1n = 0 -1n = 0 Divide each side by '-1'. n = 0 Simplifying n = 0
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