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Simplifying (A + -4)(a + 7) = -18 Reorder the terms: (-4 + A)(a + 7) = -18 Reorder the terms: (-4 + A)(7 + a) = -18 Multiply (-4 + A) * (7 + a) (-4(7 + a) + A(7 + a)) = -18 ((7 * -4 + a * -4) + A(7 + a)) = -18 ((-28 + -4a) + A(7 + a)) = -18 (-28 + -4a + (7 * A + a * A)) = -18 (-28 + -4a + (7A + aA)) = -18 Reorder the terms: (-28 + 7A + -4a + aA) = -18 (-28 + 7A + -4a + aA) = -18 Solving -28 + 7A + -4a + aA = -18 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 7A + -4a + 28 + aA = -18 + 28 Reorder the terms: -28 + 28 + 7A + -4a + aA = -18 + 28 Combine like terms: -28 + 28 = 0 0 + 7A + -4a + aA = -18 + 28 7A + -4a + aA = -18 + 28 Combine like terms: -18 + 28 = 10 7A + -4a + aA = 10 Add '4a' to each side of the equation. 7A + -4a + 4a + aA = 10 + 4a Combine like terms: -4a + 4a = 0 7A + 0 + aA = 10 + 4a 7A + aA = 10 + 4a Reorder the terms: -10 + 7A + -4a + aA = 10 + 4a + -10 + -4a Reorder the terms: -10 + 7A + -4a + aA = 10 + -10 + 4a + -4a Combine like terms: 10 + -10 = 0 -10 + 7A + -4a + aA = 0 + 4a + -4a -10 + 7A + -4a + aA = 4a + -4a Combine like terms: 4a + -4a = 0 -10 + 7A + -4a + aA = 0 The solution to this equation could not be determined.
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