5/9(3.6а- 3 3/5b)-3.5(4/7a-0.2b) заранее ) - вопрос №55339775936335354702 от svetikkosharna 21.11.2022 17:05

Question

Математика: 5/9(3.6а- 3 3/5b)-3.5(4/7a-0.2b) заранее )

svetikkosharna · Answer

3 3/5 =18/5 =3.61) 5/9(3.6a-3.6b)=5/9 *18/5(a-b) =90/45(a-b) =2(a-b)2) 3.5 =35/10 =7/20.2 =2/10 =1/57/2 *4/7a -7/2*1/5b =28/14a -7/10b =2a -0.7b3) 2(a -b) -(2a -0.7b) =2a -2b -2a +0.7b = -2b +0.7b = -1.3b...