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Simplifying 90 = -2(-3 + -3n) + 6n 90 = (-3 * -2 + -3n * -2) + 6n 90 = (6 + 6n) + 6n Combine like terms: 6n + 6n = 12n 90 = 6 + 12n Solving 90 = 6 + 12n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-12n' to each side of the equation. 90 + -12n = 6 + 12n + -12n Combine like terms: 12n + -12n = 0 90 + -12n = 6 + 0 90 + -12n = 6 Add '-90' to each side of the equation. 90 + -90 + -12n = 6 + -90 Combine like terms: 90 + -90 = 0 0 + -12n = 6 + -90 -12n = 6 + -90 Combine like terms: 6 + -90 = -84 -12n = -84 Divide each side by '-12'. n = 7 Simplifying n = 7
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