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Simplifying 2a + 15 = a + 45 Reorder the terms: 15 + 2a = a + 45 Reorder the terms: 15 + 2a = 45 + a Solving 15 + 2a = 45 + a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1a' to each side of the equation. 15 + 2a + -1a = 45 + a + -1a Combine like terms: 2a + -1a = 1a 15 + 1a = 45 + a + -1a Combine like terms: a + -1a = 0 15 + 1a = 45 + 0 15 + 1a = 45 Add '-15' to each side of the equation. 15 + -15 + 1a = 45 + -15 Combine like terms: 15 + -15 = 0 0 + 1a = 45 + -15 1a = 45 + -15 Combine like terms: 45 + -15 = 30 1a = 30 Divide each side by '1'. a = 30 Simplifying a = 30
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