cdxxc9324
10.07.2019 •
Mathematics
Use substitution to solve the system 5x-3y=23 2x+y=7
Solved
Show answers
More tips
- H Health and Medicine Why Do Humans Have One Heart?...
- S Style and Beauty How to knit a hooded cowl?...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
- S Style and Beauty Tricks and Tips: How to Get Rid of Freckles...
- H Health and Medicine What is Autism? Understanding the Basics of This Neurodevelopmental Disorder...
- F Family and Home How to Properly Use a Water Level?...
- D Dating, Love, Relationships 10 Useful Tips on How to Survive a Breakup?...
- F Food and Cooking Apple Cider Vinegar: The Ultimate Health and Beauty Solution...
- C Computers and Internet Е-head: How it Simplifies Life for Users?...
Answers on questions: Mathematics
- C Chemistry If a car rolls down a ramp, what force is beating what force ?...
- M Mathematics For each ornament that a worker makes, he is paid $1.15. He makes 4 ornaments every 15 minutes.Find the amount earned by the worker if he works for 3 hours. (method)...
- C Chemistry Food is pushed into your stomach by...
- M Mathematics How to change the fraction 17/5 in to amixed number?...
Ответ:
5x - 3(7 - 2x) = 23. Multiply out -3(7 - 2x):
5x - 21 + 6x = 23. Combining 5x and 6x, 11x - 21 = 23, or 11x = 44.
Thus, x = 4. Since y = 7 - 2x, subst. x = 4 results in the value of y:
y = 7 - 2(4) = 7 - 8 = -1.
The solution is (4,-1).
Ответ:
2.cierto
3.cierto