Ответ:\(6(x+9)=6x+54\).\(-3(-5+b)=15-3b\).\(-0.1(-t+8)=0.1t-0.8\).\(0.6(-5x+2)=-3x+1.2\).Ответ: 1) \(6x+54\); 2) \(15-3b\); 3) \(0.1t-0.8\); 4) \(-3x+1.2\).