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