Two balls with charges + 4 nC and – 8 nC were brought into contact and spread in different directions. What are the charges of the balls

Before touching, the first ball had a positive charge, and the second had a negative charge; after touching, the charges were redistributed. In this example, the charge of the second ball “neutralizes” the charge of the first and gives it more of its charge. As a result, according to the law of conservation of charges, we come to an equation of the type:
k1, k2 – charges of balls
k1, k2 = (4-8) / 2 = -2 nC