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Simplifying 3a + 18 = a Reorder the terms: 18 + 3a = a Solving 18 + 3a = 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. 18 + 3a + -1a = a + -1a Combine like terms: 3a + -1a = 2a 18 + 2a = a + -1a Combine like terms: a + -1a = 0 18 + 2a = 0 Add '-18' to each side of the equation. 18 + -18 + 2a = 0 + -18 Combine like terms: 18 + -18 = 0 0 + 2a = 0 + -18 2a = 0 + -18 Combine like terms: 0 + -18 = -18 2a = -18 Divide each side by '2'. a = -9 Simplifying a = -9
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