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Simplifying 30 + 1.50n = 12 + 3n Solving 30 + 1.50n = 12 + 3n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-3n' to each side of the equation. 30 + 1.50n + -3n = 12 + 3n + -3n Combine like terms: 1.50n + -3n = -1.5n 30 + -1.5n = 12 + 3n + -3n Combine like terms: 3n + -3n = 0 30 + -1.5n = 12 + 0 30 + -1.5n = 12 Add '-30' to each side of the equation. 30 + -30 + -1.5n = 12 + -30 Combine like terms: 30 + -30 = 0 0 + -1.5n = 12 + -30 -1.5n = 12 + -30 Combine like terms: 12 + -30 = -18 -1.5n = -18 Divide each side by '-1.5'. n = 12 Simplifying n = 12
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