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Simplifying 21 + 1.5n = 28 + -2n Solving 21 + 1.5n = 28 + -2n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2n' to each side of the equation. 21 + 1.5n + 2n = 28 + -2n + 2n Combine like terms: 1.5n + 2n = 3.5n 21 + 3.5n = 28 + -2n + 2n Combine like terms: -2n + 2n = 0 21 + 3.5n = 28 + 0 21 + 3.5n = 28 Add '-21' to each side of the equation. 21 + -21 + 3.5n = 28 + -21 Combine like terms: 21 + -21 = 0 0 + 3.5n = 28 + -21 3.5n = 28 + -21 Combine like terms: 28 + -21 = 7 3.5n = 7 Divide each side by '3.5'. n = 2 Simplifying n = 2
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