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