Question

Срочно!!!!ПЖ!!!!!!!!!!!!

Answer 1

1) -4a
2) -11,6n
3) 8b
4) -4 5/7

Answer 2

1) -8а -5а + 7а + 2а = -13а + 9а = - 4а
2) 1,3n-4,3n-5,7n-2,9n=1,3n-12,9n= -11,6n
3) 21b-10b+9b-12b= 30b-22b=8b
4) 2 1/7y +1 4/7y - 4 5/7y - 3 5/7y= 3 5/7 - 8 3/7 = - 4 5/7