Complete the rules. Use must/mustn’t keep the room clean. 2 play music after 10:00 am.

1. You must keep the room clean. (√)
2. You must play music after 10:00 am. (√)
3. You mustn’t put posters on the walls. (X)
4. You mustn’t keep pets In the room. (X)
5. You must make the bed. (√)

ответ:

пошаговое объяснение:

-4х-8,9*(9-2х)=-4х-80,1+17,8х=13,8х-80,1

1/3*(12-2,1y)+0.3y=4-0.7y+0.3y=4-0.4y

6*(3x-2)+4*(5x-1)=18x-12+20x-4=38x-16

-7*(3-4c)+14*(0.5+2c)=-21+28c+7+28c=56c-14

3*(2.1x-y)-2.8*(2x-3y)=6.2x-3y-5.6x+8.4y=0.6x+5.4y

0.4*(8t+7)-1.6*(2t-3)=3.2t+2.8-3.2t+4.8=7.6

ответ: 2/3: 12= 2/3×12=8

1/4: 12=1/4×12=3

пошанение: