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Simplifying 12 + 3n = 4n Solving 12 + 3n = 4n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-4n' to each side of the equation. 12 + 3n + -4n = 4n + -4n Combine like terms: 3n + -4n = -1n 12 + -1n = 4n + -4n Combine like terms: 4n + -4n = 0 12 + -1n = 0 Add '-12' to each side of the equation. 12 + -12 + -1n = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1n = 0 + -12 -1n = 0 + -12 Combine like terms: 0 + -12 = -12 -1n = -12 Divide each side by '-1'. n = 12 Simplifying n = 12
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