=(7/2+4/9)*х+3/18=5/18== (63/18+8/18)*х+3/18=5/18== 71/18*х+3/18=5/18== х= 71/18х=2/18. Х= 2/18*18/71 (18 сокр)=2/71
=(7/2+4/9)*х+3/18=5/18== (63/18+8/18)*х+3/18=5/18== 71/18*х+3/18=5/18== х= 71/18х=2/18. Х= 2/18*18/71 (18 сокр)=2/71