Soldato
Christ, no no no, not again, please, for the love of God, etc...
That said, the proof is 10x-x, where x is 0.9r, so the case in question comes out to 9.9r-0.9r.
Although yes, it is the same thing, since 8.9r=9.
That said, the proof is 10x-x, where x is 0.9r, so the case in question comes out to 9.9r-0.9r.
Although yes, it is the same thing, since 8.9r=9.