Упрастите выражение 3 6/7x-7/9x+4 4/63x
3 6/7х-7/9х+4 4/63х= х*(3 6/7 - 7/9 +4 4/63)=х*(27/7 -7/9 + 256/63)=х*(243/63-49/63+256/63)=х*(548/63)=8 44/63х