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