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Simplifying 15 = 2a + -3 Reorder the terms: 15 = -3 + 2a Solving 15 = -3 + 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 + -2a = -3 + 2a + -2a Combine like terms: 2a + -2a = 0 15 + -2a = -3 + 0 15 + -2a = -3 Add '-15' to each side of the equation. 15 + -15 + -2a = -3 + -15 Combine like terms: 15 + -15 = 0 0 + -2a = -3 + -15 -2a = -3 + -15 Combine like terms: -3 + -15 = -18 -2a = -18 Divide each side by '-2'. a = 9 Simplifying a = 9
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