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Simplifying -7(1 + n) = -18 + 4n (1 * -7 + n * -7) = -18 + 4n (-7 + -7n) = -18 + 4n Solving -7 + -7n = -18 + 4n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-4n' to each side of the equation. -7 + -7n + -4n = -18 + 4n + -4n Combine like terms: -7n + -4n = -11n -7 + -11n = -18 + 4n + -4n Combine like terms: 4n + -4n = 0 -7 + -11n = -18 + 0 -7 + -11n = -18 Add '7' to each side of the equation. -7 + 7 + -11n = -18 + 7 Combine like terms: -7 + 7 = 0 0 + -11n = -18 + 7 -11n = -18 + 7 Combine like terms: -18 + 7 = -11 -11n = -11 Divide each side by '-11'. n = 1 Simplifying n = 1
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