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Simplifying 90 = 5(-2 + -5n) 90 = (-2 * 5 + -5n * 5) 90 = (-10 + -25n) Solving 90 = -10 + -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. 90 + 25n = -10 + -25n + 25n Combine like terms: -25n + 25n = 0 90 + 25n = -10 + 0 90 + 25n = -10 Add '-90' to each side of the equation. 90 + -90 + 25n = -10 + -90 Combine like terms: 90 + -90 = 0 0 + 25n = -10 + -90 25n = -10 + -90 Combine like terms: -10 + -90 = -100 25n = -100 Divide each side by '25'. n = -4 Simplifying n = -4
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