Question

Срочно!!!!!!!!!!!!!!!
Даю 20 баллов!!!!!!

Answer 1

2*10+2*9+2*8/2*9+(4*2)*2=(2*2+2+1)×2*8/2*9+4*4=(4+2+1)×2*8/2*9+2*8=7×2*8/(2+1)×2*8=7/3=2 1/3

/-дробь, *2 квадрат