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Simplifying 30 = 12 + n Solving 30 = 12 + 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. 30 + -1n = 12 + n + -1n Combine like terms: n + -1n = 0 30 + -1n = 12 + 0 30 + -1n = 12 Add '-30' to each side of the equation. 30 + -30 + -1n = 12 + -30 Combine like terms: 30 + -30 = 0 0 + -1n = 12 + -30 -1n = 12 + -30 Combine like terms: 12 + -30 = -18 -1n = -18 Divide each side by '-1'. n = 18 Simplifying n = 18
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