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Simplifying 21 + -3n = 2x + -3 Reorder the terms: 21 + -3n = -3 + 2x Solving 21 + -3n = -3 + 2x Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -3n = -3 + -21 + 2x Combine like terms: 21 + -21 = 0 0 + -3n = -3 + -21 + 2x -3n = -3 + -21 + 2x Combine like terms: -3 + -21 = -24 -3n = -24 + 2x Divide each side by '-3'. n = 8 + -0.6666666667x Simplifying n = 8 + -0.6666666667x
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