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Simplifying 7z2 + 21z + -1az + -3a = 0 Reorder the terms: -3a + -1az + 21z + 7z2 = 0 Solving -3a + -1az + 21z + 7z2 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-21z' to each side of the equation. -3a + -1az + 21z + -21z + 7z2 = 0 + -21z Combine like terms: 21z + -21z = 0 -3a + -1az + 0 + 7z2 = 0 + -21z -3a + -1az + 7z2 = 0 + -21z Remove the zero: -3a + -1az + 7z2 = -21z Add '-7z2' to each side of the equation. -3a + -1az + 7z2 + -7z2 = -21z + -7z2 Combine like terms: 7z2 + -7z2 = 0 -3a + -1az + 0 = -21z + -7z2 -3a + -1az = -21z + -7z2 Reorder the terms: -3a + -1az + 21z + 7z2 = -21z + 21z + -7z2 + 7z2 Combine like terms: -21z + 21z = 0 -3a + -1az + 21z + 7z2 = 0 + -7z2 + 7z2 -3a + -1az + 21z + 7z2 = -7z2 + 7z2 Combine like terms: -7z2 + 7z2 = 0 -3a + -1az + 21z + 7z2 = 0 The solution to this equation could not be determined.
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