(11a-b)²+(9a+7b)(8a-13b)=121a²+b²-22ab+72a²-117ab+56ab-91b²=193a²-90b²-83ab
Ответ:
4(х-1)*2=12=+3
8х-8=12х+3
8х-12х=8+3
-4х=11
х=-2|3/4 (две целых три четвертых)
Объяснение:
второе уравнение списано с ошибкой. в первой скобке после 4х следует "+" и подле ничего нет. ИСПРАВИТЬ
Нехай перший робітник за 1 год зробить х деталей, а другий у деталей. Маємо систему рівнянь:
3(х+у)=54
2у-3х=6
х+у=18; х=18-у
2у-3(18-у)=6
х=18-у
2у-54+3у=6
х=18-у
5у=60
х=18-у
у=12
х=6
у=12
Відповідь: 6 деталей, 12 деталей.
<span>During the week I always have to get up early for work so on Sunday I love to wake up late, usually around 9am and then get up 30 minutes later.</span><span>The first thing I do is switch on the coffee maker. No instant coffee for me today! On Sundays I always take the time to make some good coffee. While that's getting ready, I quickly throw onsome clothes and pick up a newspaper from the local shop.</span><span>With my coffee and paper, I spend the rest of the morning on the sofa. Sometimes I even turn offmy phone for a couple of hours so no one calls me.</span><span>Later in the day, I like to hang out with friends over lunch and catch up with their news and gossip.
</span><span>
</span><span>All in all, that's my idea of a good day!
ну вот так как то))
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