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Simplifying -91 = 7(3n + -7) Reorder the terms: -91 = 7(-7 + 3n) -91 = (-7 * 7 + 3n * 7) -91 = (-49 + 21n) Solving -91 = -49 + 21n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21n' to each side of the equation. -91 + -21n = -49 + 21n + -21n Combine like terms: 21n + -21n = 0 -91 + -21n = -49 + 0 -91 + -21n = -49 Add '91' to each side of the equation. -91 + 91 + -21n = -49 + 91 Combine like terms: -91 + 91 = 0 0 + -21n = -49 + 91 -21n = -49 + 91 Combine like terms: -49 + 91 = 42 -21n = 42 Divide each side by '-21'. n = -2 Simplifying n = -2
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