Вот смотри:
3 литровых пакета молока по цене двух, это значит (2*57):3=38руб(один пакет по акции), ещё осталось купить два литра, берём двухлитровый пакет и получаем наименьшую сумму: 114+97=211руб
Пусть х - первая часть шнура, тогда (х+20) - вторая часть шнура. По условию задачи длина всего шнура 90 см. Составим уравнение.
х+(х+20)=90
2х+20=90
2х=90-20
2х=70
х=70:2
х=35
35 см - длина первой части шнура
90-35=55 (см) - длина второй части шнура
Ответ: 35 см, 55 см .
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we have known each other for many years
he has short blonde hair and light blue eyes
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his face is covered with freckles
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1 11\12а=1 1\3-0.25а-2\3а
23/12а+1/4а+2/3а=4/3
а×(23/12+3/12+8/12)=4/3
17/6а=4/3
а=4/3÷17/6=4/3×6/17=8/17
при а=8/17 выражение верно, т.е.будет равно нулю.
чтобы выражение было больше двух, надо чтобы а было больше либо равно 12/17
17/6×12/17-4/3=2