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Simplifying -4 = -4 + 8 + -2a Combine like terms: -4 + 8 = 4 -4 = 4 + -2a Solving -4 = 4 + -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. -4 + 2a = 4 + -2a + 2a Combine like terms: -2a + 2a = 0 -4 + 2a = 4 + 0 -4 + 2a = 4 Add '4' to each side of the equation. -4 + 4 + 2a = 4 + 4 Combine like terms: -4 + 4 = 0 0 + 2a = 4 + 4 2a = 4 + 4 Combine like terms: 4 + 4 = 8 2a = 8 Divide each side by '2'. a = 4 Simplifying a = 4
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