3 в=10у/9к^x
7 2/5 x+1/3 x+12=x 6/15 x+5/15 x+12=x
4/15 x=12 x=12/4/15=60
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3 в=10у/9к^x
7 2/5 x+1/3 x+12=x 6/15 x+5/15 x+12=x
4/15 x=12 x=12/4/15=60