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Simplifying -4 = -2a + b Solving -4 = -2a + b 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 = -2a + 2a + b Combine like terms: -2a + 2a = 0 -4 + 2a = 0 + b -4 + 2a = b Add '4' to each side of the equation. -4 + 4 + 2a = 4 + b Combine like terms: -4 + 4 = 0 0 + 2a = 4 + b 2a = 4 + b Divide each side by '2'. a = 2 + 0.5b Simplifying a = 2 + 0.5b
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