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Simplifying 4 = a(-1) + b Reorder the terms for easier multiplication: 4 = -1a + b Solving 4 = -1a + b Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add 'a' to each side of the equation. 4 + a = -1a + a + b Combine like terms: -1a + a = 0 4 + a = 0 + b 4 + a = b Add '-4' to each side of the equation. 4 + -4 + a = -4 + b Combine like terms: 4 + -4 = 0 0 + a = -4 + b a = -4 + b Simplifying a = -4 + b
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