Ответ:\((x+3.2)-(x+4.5)=x+3.2-x-4.5=-1.3\).\(1.4(a-2)-(6-2a)=1.4a-2.8-6+2a=3.4a-8.8\).Ответ: 1) \(-1.3\); 2) \(3.4a-8.8\).