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Simplifying -30 = -2a Solving -30 = -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. -30 + 2a = -2a + 2a Combine like terms: -2a + 2a = 0 -30 + 2a = 0 Add '30' to each side of the equation. -30 + 30 + 2a = 0 + 30 Combine like terms: -30 + 30 = 0 0 + 2a = 0 + 30 2a = 0 + 30 Combine like terms: 0 + 30 = 30 2a = 30 Divide each side by '2'. a = 15 Simplifying a = 15
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