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Simplifying (a + 1)(b + -9) = 0 Reorder the terms: (1 + a)(b + -9) = 0 Reorder the terms: (1 + a)(-9 + b) = 0 Multiply (1 + a) * (-9 + b) (1(-9 + b) + a(-9 + b)) = 0 ((-9 * 1 + b * 1) + a(-9 + b)) = 0 ((-9 + 1b) + a(-9 + b)) = 0 (-9 + 1b + (-9 * a + b * a)) = 0 (-9 + 1b + (-9a + ab)) = 0 Reorder the terms: (-9 + -9a + ab + 1b) = 0 (-9 + -9a + ab + 1b) = 0 Solving -9 + -9a + ab + 1b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '9' to each side of the equation. -9 + -9a + ab + 9 + 1b = 0 + 9 Reorder the terms: -9 + 9 + -9a + ab + 1b = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -9a + ab + 1b = 0 + 9 -9a + ab + 1b = 0 + 9 Combine like terms: 0 + 9 = 9 -9a + ab + 1b = 9 Add '-1b' to each side of the equation. -9a + ab + 1b + -1b = 9 + -1b Combine like terms: 1b + -1b = 0 -9a + ab + 0 = 9 + -1b -9a + ab = 9 + -1b Reorder the terms: -9 + -9a + ab + b = 9 + -1b + -9 + b Reorder the terms: -9 + -9a + ab + b = 9 + -9 + -1b + b Combine like terms: 9 + -9 = 0 -9 + -9a + ab + b = 0 + -1b + b -9 + -9a + ab + b = -1b + b Combine like terms: -1b + b = 0 -9 + -9a + ab + b = 0 The solution to this equation could not be determined.
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