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Simplifying X(x + -7) = x + -21 Reorder the terms: X(-7 + x) = x + -21 (-7 * X + x * X) = x + -21 (-7X + xX) = x + -21 Reorder the terms: -7X + xX = -21 + x Solving -7X + xX = -21 + x Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Reorder the terms: 21 + -7X + -1x + xX = -21 + x + 21 + -1x Reorder the terms: 21 + -7X + -1x + xX = -21 + 21 + x + -1x Combine like terms: -21 + 21 = 0 21 + -7X + -1x + xX = 0 + x + -1x 21 + -7X + -1x + xX = x + -1x Combine like terms: x + -1x = 0 21 + -7X + -1x + xX = 0 The solution to this equation could not be determined.
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