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Simplifying 390 + -4n = n Solving 390 + -4n = 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. 390 + -4n + -1n = n + -1n Combine like terms: -4n + -1n = -5n 390 + -5n = n + -1n Combine like terms: n + -1n = 0 390 + -5n = 0 Add '-390' to each side of the equation. 390 + -390 + -5n = 0 + -390 Combine like terms: 390 + -390 = 0 0 + -5n = 0 + -390 -5n = 0 + -390 Combine like terms: 0 + -390 = -390 -5n = -390 Divide each side by '-5'. n = 78 Simplifying n = 78
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