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Simplifying 20 + -1n = 7 Solving 20 + -1n = 7 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1n = 7 + -20 Combine like terms: 20 + -20 = 0 0 + -1n = 7 + -20 -1n = 7 + -20 Combine like terms: 7 + -20 = -13 -1n = -13 Divide each side by '-1'. n = 13 Simplifying n = 13
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