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Simplifying 2a + -6 = 15 + -4a Reorder the terms: -6 + 2a = 15 + -4a Solving -6 + 2a = 15 + -4a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '4a' to each side of the equation. -6 + 2a + 4a = 15 + -4a + 4a Combine like terms: 2a + 4a = 6a -6 + 6a = 15 + -4a + 4a Combine like terms: -4a + 4a = 0 -6 + 6a = 15 + 0 -6 + 6a = 15 Add '6' to each side of the equation. -6 + 6 + 6a = 15 + 6 Combine like terms: -6 + 6 = 0 0 + 6a = 15 + 6 6a = 15 + 6 Combine like terms: 15 + 6 = 21 6a = 21 Divide each side by '6'. a = 3.5 Simplifying a = 3.5
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