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Simplifying 3(0.75a + 3) + 6 = 87 Reorder the terms: 3(3 + 0.75a) + 6 = 87 (3 * 3 + 0.75a * 3) + 6 = 87 (9 + 2.25a) + 6 = 87 Reorder the terms: 9 + 6 + 2.25a = 87 Combine like terms: 9 + 6 = 15 15 + 2.25a = 87 Solving 15 + 2.25a = 87 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 2.25a = 87 + -15 Combine like terms: 15 + -15 = 0 0 + 2.25a = 87 + -15 2.25a = 87 + -15 Combine like terms: 87 + -15 = 72 2.25a = 72 Divide each side by '2.25'. a = 32 Simplifying a = 32
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