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Simplifying 7a + -4b + -2a + 3b + 4 = 0 Reorder the terms: 4 + 7a + -2a + -4b + 3b = 0 Combine like terms: 7a + -2a = 5a 4 + 5a + -4b + 3b = 0 Combine like terms: -4b + 3b = -1b 4 + 5a + -1b = 0 Solving 4 + 5a + -1b = 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 + 5a + -4 + -1b = 0 + -4 Reorder the terms: 4 + -4 + 5a + -1b = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 5a + -1b = 0 + -4 5a + -1b = 0 + -4 Combine like terms: 0 + -4 = -4 5a + -1b = -4 Add 'b' to each side of the equation. 5a + -1b + b = -4 + b Combine like terms: -1b + b = 0 5a + 0 = -4 + b 5a = -4 + b Divide each side by '5'. a = -0.8 + 0.2b Simplifying a = -0.8 + 0.2b
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