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