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Simplifying 2a + b + -1c = 7 Solving 2a + b + -1c = 7 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1b' to each side of the equation. 2a + b + -1b + -1c = 7 + -1b Combine like terms: b + -1b = 0 2a + 0 + -1c = 7 + -1b 2a + -1c = 7 + -1b Add 'c' to each side of the equation. 2a + -1c + c = 7 + -1b + c Combine like terms: -1c + c = 0 2a + 0 = 7 + -1b + c 2a = 7 + -1b + c Divide each side by '2'. a = 3.5 + -0.5b + 0.5c Simplifying a = 3.5 + -0.5b + 0.5c
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