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Simplifying 128 = -4(-4 + -7n) 128 = (-4 * -4 + -7n * -4) 128 = (16 + 28n) Solving 128 = 16 + 28n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-28n' to each side of the equation. 128 + -28n = 16 + 28n + -28n Combine like terms: 28n + -28n = 0 128 + -28n = 16 + 0 128 + -28n = 16 Add '-128' to each side of the equation. 128 + -128 + -28n = 16 + -128 Combine like terms: 128 + -128 = 0 0 + -28n = 16 + -128 -28n = 16 + -128 Combine like terms: 16 + -128 = -112 -28n = -112 Divide each side by '-28'. n = 4 Simplifying n = 4
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