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Simplifying 9a + -1b + 7 = -1 Reorder the terms: 7 + 9a + -1b = -1 Solving 7 + 9a + -1b = -1 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + 9a + -7 + -1b = -1 + -7 Reorder the terms: 7 + -7 + 9a + -1b = -1 + -7 Combine like terms: 7 + -7 = 0 0 + 9a + -1b = -1 + -7 9a + -1b = -1 + -7 Combine like terms: -1 + -7 = -8 9a + -1b = -8 Add 'b' to each side of the equation. 9a + -1b + b = -8 + b Combine like terms: -1b + b = 0 9a + 0 = -8 + b 9a = -8 + b Divide each side by '9'. a = -0.8888888889 + 0.1111111111b Simplifying a = -0.8888888889 + 0.1111111111b
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