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Simplifying 9a + 6b + -1(7a + -4b) + 2 = 0 9a + 6b + (7a * -1 + -4b * -1) + 2 = 0 9a + 6b + (-7a + 4b) + 2 = 0 Reorder the terms: 2 + 9a + -7a + 6b + 4b = 0 Combine like terms: 9a + -7a = 2a 2 + 2a + 6b + 4b = 0 Combine like terms: 6b + 4b = 10b 2 + 2a + 10b = 0 Solving 2 + 2a + 10b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + 2a + -2 + 10b = 0 + -2 Reorder the terms: 2 + -2 + 2a + 10b = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 2a + 10b = 0 + -2 2a + 10b = 0 + -2 Combine like terms: 0 + -2 = -2 2a + 10b = -2 Add '-10b' to each side of the equation. 2a + 10b + -10b = -2 + -10b Combine like terms: 10b + -10b = 0 2a + 0 = -2 + -10b 2a = -2 + -10b Divide each side by '2'. a = -1 + -5b Simplifying a = -1 + -5b
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