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Simplifying 2a + -1b + -1c + 4 = 0 Reorder the terms: 4 + 2a + -1b + -1c = 0 Solving 4 + 2a + -1b + -1c = 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 + -1b + -4 + -1c = 0 + -4 Reorder the terms: 4 + -4 + 2a + -1b + -1c = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 2a + -1b + -1c = 0 + -4 2a + -1b + -1c = 0 + -4 Combine like terms: 0 + -4 = -4 2a + -1b + -1c = -4 Add 'b' to each side of the equation. 2a + -1b + b + -1c = -4 + b Combine like terms: -1b + b = 0 2a + 0 + -1c = -4 + b 2a + -1c = -4 + b Add 'c' to each side of the equation. 2a + -1c + c = -4 + b + c Combine like terms: -1c + c = 0 2a + 0 = -4 + b + c 2a = -4 + b + c Divide each side by '2'. a = -2 + 0.5b + 0.5c Simplifying a = -2 + 0.5b + 0.5c
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