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