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Simplifying (e + 2) * 3 = 21 Reorder the terms: (2 + e) * 3 = 21 Reorder the terms for easier multiplication: 3(2 + e) = 21 (2 * 3 + e * 3) = 21 (6 + 3e) = 21 Solving 6 + 3e = 21 Solving for variable 'e'. Move all terms containing e to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 3e = 21 + -6 Combine like terms: 6 + -6 = 0 0 + 3e = 21 + -6 3e = 21 + -6 Combine like terms: 21 + -6 = 15 3e = 15 Divide each side by '3'. e = 5 Simplifying e = 5
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