We don't not know what would x really equal. So when solving this, it would look like the problem would be not quite finished, but it would be, so we would be subtracting this, but keeping x as it's self.
Both plant and animal cells can have endoplasmic reticulum. Both plant and animal cells can have mitochondria. In animal cells, chromosomes contain the master plan for cell activities and cell development. The cell membrane controls which substances enter and leave a plant cell
