Question

1)3(5a-3b)-4(2a+7b),если a=-0,2;b=-0,1
2)-(2,5m-3 3/4n-1,2m),если m=3 1/3;
n=-1 1/5

Answer 1

1) 3(5а-3b) - 4(2а+7b) = 15a-9b-8a-28b = 7a-37b
     Если a=-0,2; b=-0,1, то:
     7(-0,2) - 37(-0,1) = -1,4+3,7 = 2,3.

Answer 2

2) https://znanija.com/task/17272877