Ответ:\(-6a-2-5a+3=-11a+1\).\(-0.4m+0.7+2-1m=-1.4m+2.7\).\(6n-(5n-(4n-3n+2))=6n-(5n-n-2)=2n+2\).\(2.7\cdot\frac49=1.2\), \(2.7\cdot\frac5{18}=0.75\). Значит, \(1.2-0.75y+y=1.2+0.25y\).