Question

Упроститте выражения :
8,4-2,7(7b-1,3(10-11b))-15,7b
Пж даю 59 балов

Answer 1

.......................................

Answer 2

8,4-2,7(7b-1,3(10-11b))-15,7b=8,4-2,7(7b-13+14,3b)-15,7b=8,4-2,7(21,3b-13)-
15,7b=8,4-57,51b+35,1-15,7b=43,5-73,21b