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Simplifying (c + -21)(x + 21) = 0 Reorder the terms: (-21 + c)(x + 21) = 0 Reorder the terms: (-21 + c)(21 + x) = 0 Multiply (-21 + c) * (21 + x) (-21(21 + x) + c(21 + x)) = 0 ((21 * -21 + x * -21) + c(21 + x)) = 0 ((-441 + -21x) + c(21 + x)) = 0 (-441 + -21x + (21 * c + x * c)) = 0 (-441 + -21x + (21c + cx)) = 0 Reorder the terms: (-441 + 21c + cx + -21x) = 0 (-441 + 21c + cx + -21x) = 0 Solving -441 + 21c + cx + -21x = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '441' to each side of the equation. -441 + 21c + cx + 441 + -21x = 0 + 441 Reorder the terms: -441 + 441 + 21c + cx + -21x = 0 + 441 Combine like terms: -441 + 441 = 0 0 + 21c + cx + -21x = 0 + 441 21c + cx + -21x = 0 + 441 Combine like terms: 0 + 441 = 441 21c + cx + -21x = 441 Add '21x' to each side of the equation. 21c + cx + -21x + 21x = 441 + 21x Combine like terms: -21x + 21x = 0 21c + cx + 0 = 441 + 21x 21c + cx = 441 + 21x Reorder the terms: -441 + 21c + cx + -21x = 441 + 21x + -441 + -21x Reorder the terms: -441 + 21c + cx + -21x = 441 + -441 + 21x + -21x Combine like terms: 441 + -441 = 0 -441 + 21c + cx + -21x = 0 + 21x + -21x -441 + 21c + cx + -21x = 21x + -21x Combine like terms: 21x + -21x = 0 -441 + 21c + cx + -21x = 0 The solution to this equation could not be determined.
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