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Simplifying 21 + -1n = -5(1 + -5n) 21 + -1n = (1 * -5 + -5n * -5) 21 + -1n = (-5 + 25n) Solving 21 + -1n = -5 + 25n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-25n' to each side of the equation. 21 + -1n + -25n = -5 + 25n + -25n Combine like terms: -1n + -25n = -26n 21 + -26n = -5 + 25n + -25n Combine like terms: 25n + -25n = 0 21 + -26n = -5 + 0 21 + -26n = -5 Add '-21' to each side of the equation. 21 + -21 + -26n = -5 + -21 Combine like terms: 21 + -21 = 0 0 + -26n = -5 + -21 -26n = -5 + -21 Combine like terms: -5 + -21 = -26 -26n = -26 Divide each side by '-26'. n = 1 Simplifying n = 1
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