Предмет: Математика, автор: Умняшка121

знайдіть значення виразу

4(5х-3у) - 6(3х- у), якщо 3х-у=2.1

покажите решение!

Ответы

Автор ответа: TheDeep
0

4(5х-2у)-6*2,1=

=10х-12у-12,6=

=10х-12(3х-2,1)-12,6=

=10х-36х+25,2-12,6=

=12,6-26х

Дальше вродь не сокращается...(

Автор ответа: Nence
0

4(5х-2у)-6*2,1 = 20х-12у-12,6 = 20х-12(3х-2,1)-12,6 = 20х-36х+25,2-12,6 = 12,6-16х

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Математика, автор: Аноним
пжжжжжжжжжжжжжжжжж отинем 15 балл​
7 лет назад
Предмет: Физика, автор: araisabitbekkyzy
Пожалуйста, помогите! ​
7 лет назад
Предмет: Английский язык, автор: asylbekyoutube
• READING I’m sure we all know by now that exercise is great for you. But let’s be honest, sometimes finding that motivation to work out can be a little difficult. So, in this post, I am going to share my top five reasons for working out. A. When you work out, your body produces endorphins, which will give you a rush of euphoria and happiness. You will feel better after a workout than you did before it. Next time you’re having a bad day, try going for a fast-paced run or taking a spinning class, and the day won’t seem so bad after all. B.Whenever I move to a new city to study or work, I look for exercise classes to do. You meet like-minded people, you can support each other during a difficult workout and you all share a collective feeling of euphoria when the class finishes! C.We all know the physical effects of exercise on our bodies but we don’t always talk about the mental effects. Exercise might give you a feeling of confidence from being comfortable with your body and appearance. This new confidence might even help in your social or work life. D.Focusing on lifting weights or going for a run can help you forget the problems and stress of daily life, studies or work. During exams, I always spend an hour a day in the gym. It makes me feel less anxious and it also helps me to sleep those important eight hours the night before a big exam. E.Every day, the 20 minutes on the treadmill get easier, the weights feel lighter and you feel a great sense of achievement. It's a great feeling doing something you couldn’t do before and knowing it’s a result of your hard work. So, next time you’re feeling down, put your trainers on and get sweating. It might not be easy but I promise you will feel so much better once you have finished! Task Match the headings 1-5 with the paragraphs A-E.
1) Finally, exercise makes us feel strong, fit and healthy!___________A
2) Exercise makes you feel confident.__________________________ B
3) Exercise can completely change your mood!___________________C
4) Exercising is socixable____________________________________ D
5) It helps to relieve stress____________________________________E
7 лет назад
Предмет: Литература, автор: илья911

Пожалуйста помогите .Ответьте на вопрос: Почему роман.ведущее место в котором занимаю петр гринёв и пугачёв назван капитанской дочкой ?
11 лет назад
Предмет: Алгебра, автор: Димон453
найдите нод и нок чисел 846 и 246
11 лет назад