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Simplifying 21 = 7xn Solving 21 = 7nx Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7nx' to each side of the equation. 21 + -7nx = 7nx + -7nx Combine like terms: 7nx + -7nx = 0 21 + -7nx = 0 Add '-21' to each side of the equation. 21 + -21 + -7nx = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -7nx = 0 + -21 -7nx = 0 + -21 Combine like terms: 0 + -21 = -21 -7nx = -21 Divide each side by '-7x'. n = 3x-1 Simplifying n = 3x-1
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