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Simplifying 7b(a + -9) + -8(a + -9) = 0 Reorder the terms: 7b(-9 + a) + -8(a + -9) = 0 (-9 * 7b + a * 7b) + -8(a + -9) = 0 Reorder the terms: (7ab + -63b) + -8(a + -9) = 0 (7ab + -63b) + -8(a + -9) = 0 Reorder the terms: 7ab + -63b + -8(-9 + a) = 0 7ab + -63b + (-9 * -8 + a * -8) = 0 7ab + -63b + (72 + -8a) = 0 Reorder the terms: 72 + -8a + 7ab + -63b = 0 Solving 72 + -8a + 7ab + -63b = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-72' to each side of the equation. 72 + -8a + 7ab + -72 + -63b = 0 + -72 Reorder the terms: 72 + -72 + -8a + 7ab + -63b = 0 + -72 Combine like terms: 72 + -72 = 0 0 + -8a + 7ab + -63b = 0 + -72 -8a + 7ab + -63b = 0 + -72 Combine like terms: 0 + -72 = -72 -8a + 7ab + -63b = -72 Add '63b' to each side of the equation. -8a + 7ab + -63b + 63b = -72 + 63b Combine like terms: -63b + 63b = 0 -8a + 7ab + 0 = -72 + 63b -8a + 7ab = -72 + 63b Reorder the terms: 72 + -8a + 7ab + -63b = -72 + 63b + 72 + -63b Reorder the terms: 72 + -8a + 7ab + -63b = -72 + 72 + 63b + -63b Combine like terms: -72 + 72 = 0 72 + -8a + 7ab + -63b = 0 + 63b + -63b 72 + -8a + 7ab + -63b = 63b + -63b Combine like terms: 63b + -63b = 0 72 + -8a + 7ab + -63b = 0 The solution to this equation could not be determined.
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