а) 18,36:(4,3+m)+5,1=7,4


б) 8 16/27-(x-2 17/27)=8 5/27

18,36:(4,3+m)+5,1=7,418,36:(4,3+m)=7,4-5,118,36:(4,3+m)=2,34,3+m=18,36:2,34,3+m=7 113/115m=7 113/115 - 4.3m=2 133/230________________8 16/27-(x-2 17/27)=8 5/27x-2 17/27=8 16/27-8 5/27x-2 17/27=11/27x=11/27+2 17/27х=2 28/27х=3 1/27