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Simplifying [X2 + -1x + -21] = 9 Reorder the terms: [-21 + X2 + -1x] = 9 Remove brackets around [-21 + X2 + -1x] -21 + X2 + -1x = 9 Solving -21 + X2 + -1x = 9 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '21' to each side of the equation. -21 + X2 + 21 + -1x = 9 + 21 Reorder the terms: -21 + 21 + X2 + -1x = 9 + 21 Combine like terms: -21 + 21 = 0 0 + X2 + -1x = 9 + 21 X2 + -1x = 9 + 21 Combine like terms: 9 + 21 = 30 X2 + -1x = 30 Add 'x' to each side of the equation. X2 + -1x + x = 30 + x Combine like terms: -1x + x = 0 X2 + 0 = 30 + x X2 = 30 + x Simplifying X2 = 30 + x Reorder the terms: -30 + X2 + -1x = 30 + x + -30 + -1x Reorder the terms: -30 + X2 + -1x = 30 + -30 + x + -1x Combine like terms: 30 + -30 = 0 -30 + X2 + -1x = 0 + x + -1x -30 + X2 + -1x = x + -1x Combine like terms: x + -1x = 0 -30 + X2 + -1x = 0 The solution to this equation could not be determined.
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