Предмет: Математика, автор: Danon711

магазин за три дня продал 1240 кг картошки.За первый день продали 45% всей картошки, а за второй день- на 134 кг больше, чем за третий день. Сколько кг картошки продали за каждый день?

Ответы

Автор ответа: Аноним

1240÷100+45=558 кг в 1-й день
1240-558=682 - 2 и 3 день
х кг - за 3 день
х+134 - за 2 день
х+х+134=682
2х=682-134=548
х=548÷2=274 (3 день)
274+134=408 (2 день)

Аноним: в первом действии перед 45 не плюс, а знак умножить! прошу прощения за опечатку

Danon711: Спасибо огромное, я понял. То я решил, а в четвертом действии с уровнением запутался.

Автор ответа: криро1828

100%=1240кг
45%=x
100x=55800
x=55800÷100
x=558кг в первый день
558+134+x+x=1240
692+2x=1240
2x=1240-692
2x=548
x=548/2
x=274 в третий день

558+274+x=1240
832+x=1240
x=1240-832
x=408 в второй день

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: filis021220

1. it (rain) the whole day yesterday? 2. We met her at the bus stop. She (wait) for the bus 3. His brother (not/help) him to pack his things when I came 4. Sabina and Karina (watch) TV at 7 o'clock yesterday 7 5. (play) with you at 12 o'clock last night? your friends

5 лет назад

Предмет: Биология, автор: Okoro4oGG

Для чего нужны крылья птицам?

5 лет назад

Предмет: Английский язык, автор: typeNunaika

READING Task. Read the text "My working day" For euch question, decide if i "True" or "False" My name is Cynthia My working day starts very early From Monday to Friday I get up at half past three and I have a shower and a cup of coffee I usually leave the house at ten past four because the car always arrives a few minutes early, I get to the studio a about five o'clock and stan work. My pro ramme nood Murning Britain starts at seven o'clock and finishes at nine o'clock Then I leave the studio at a quarter past ten. After that, I go shopping and visit some friends. I peu home at three o'clock. A woman helps me with the housework and the ironing Tread a newspaper and do some work Then my husband gets home at half past five in the evening and I cook dinner. We stay at home in the evening We don't go out because I go to bed very early. We usually watch television and then I go to bed at half past eight. I'm usually asleep by nine o'clock. I think my job is very interesting but I don't like petung up very early, Shes a television joumalist Are B False She drives her car to work True She goes home after the programme finishes B Faisc She works with her husband True False She goes to bed early during the week She likes everything about her job Tre false Her husband gets home at half past four in the evening Anaal ne fa

5 лет назад