Question

раскройте скобки
1) 7,9-(n+6,1);
2) -2,4-(4,5-2,4n);
3)6,2n-(5,1n-4);
4)9,4b-2,9n-(5,2b-2,5n).

Answer 1

1)7,9-n -6,1= 0,8 - n
2)-2,4-4,5+2,4n=-6,9+2,4n
3) 6,2n-5,1n+4=11,3n+4
4) 9,4b-2,9n-5,2b+2,5n=4,2b+0,4n