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Simplifying 3ax + 21x + -1a + -7 = 0 Reorder the terms: -7 + -1a + 3ax + 21x = 0 Solving -7 + -1a + 3ax + 21x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '7' to each side of the equation. -7 + -1a + 3ax + 7 + 21x = 0 + 7 Reorder the terms: -7 + 7 + -1a + 3ax + 21x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1a + 3ax + 21x = 0 + 7 -1a + 3ax + 21x = 0 + 7 Combine like terms: 0 + 7 = 7 -1a + 3ax + 21x = 7 Add '-21x' to each side of the equation. -1a + 3ax + 21x + -21x = 7 + -21x Combine like terms: 21x + -21x = 0 -1a + 3ax + 0 = 7 + -21x -1a + 3ax = 7 + -21x Reorder the terms: -7 + -1a + 3ax + 21x = 7 + -21x + -7 + 21x Reorder the terms: -7 + -1a + 3ax + 21x = 7 + -7 + -21x + 21x Combine like terms: 7 + -7 = 0 -7 + -1a + 3ax + 21x = 0 + -21x + 21x -7 + -1a + 3ax + 21x = -21x + 21x Combine like terms: -21x + 21x = 0 -7 + -1a + 3ax + 21x = 0 The solution to this equation could not be determined.
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