часов. Товарный поезд пройдет это же расстояние за 
часов, что на 1 час больше. - = 1 (умножим на х(х-20), чтобы избавиться от дробей)
- 
=1*x(x-20)
= 60 
= -40 - не подходит, поскольку х < 0
1 "Where do you live?" -Sue asked him. Косвенная речь:Sue asked him"Where do you live?"
2 "Have you done your homework?" -mom asked me. Косвенная речь:Mom asked me "Have you done your homework?"
3 "Will you go to the cinema tomorrow?" - asked Robert from his sister. Косвенная речь:Robert asked from his sister "Will you go to the cinema tomorrow?"
4 Mom asked from her daughter:"How many grades did you get yesterday?"
"How many grades did you get yesterday?" - asked mom from her daughter.
5 Anna asked me:"What music do you listenning now?" "What music do you listenning now?" - asked me Anna
Пошаговое объяснение:
f:80 = 600-400
f:80 = 200
f = 200*80 = 1600
б) 500*x-600=400
500*x = 400 + 600
500*x = 1000
x = 2
в)1300-(b+800)=400
-(b+800)=400-1300
-b-800 = - 900
- b = - 900+ 800
- b = -100
b = 100
г) 600*20-n=60
600*20-n=60
12000-n = 60
12000- 60 = n
n = 11 940
д)(600-500):y=20
100:y=20
у = 5
е)d:(1300-800)=4
d : 500 = 4
d = 500*4
d = 2 000