11 5х 8 7 1 5х 5 9 July 8, 2019 16 32 64 128 11 5х-8 7=1 5х+5 9 5-8х 11 11 5-8 8 11 5x-8 7=1 5x+5 9 11 7/9-х=8 5/7
