Jadalamanna
10.09.2020 •
Mathematics
X-3y+2z=11,-x+4y+3z=5,2x-2y-4z=2
Solved
Show answers
More tips
- F Food and Cooking How to Set Up Ventrilo - The Ultimate Guide...
- L Leisure and Entertainment How to Make a Crab Trap in Just a Few Minutes...
- H Health and Medicine How Much Does Abortion Cost? Expert Answers and Insights...
- S Sport How to Build Arm Muscles? Effective Exercises and Tips...
- H Health and Medicine When can it be said that a person has a normal pulse?...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- H Health and Medicine How to perform artificial respiration?...
- H Health and Medicine 10 Tips for Avoiding Vitamin Deficiency...
Answers on questions: Mathematics
- M Mathematics Cari kecerunan garis lurus melalui titik (5,9) dan (8,3)...
- C Computers and Technology Mysql inner join example with where clause on both tables...
- B Biology The females of two species of fruit fly, Drosophila melanomas tee and Drosophila simulans release slightly different mating hormones called pheromones, which are used...
- H History Why did the french and indian war start?...
Ответ:
We coundt x and we've got
x=11+3y-2z
Third equation is 2x-2y-4z=2
We count also x and we've got:
2x=2+2y+4z /:2
x=1+y+2z
so:
11+3y-2z=1+y+2z
2y-4z=-10 /:2
y-2z=-5
y=2z-5
so
x=1+y+2z
x=1+2z-5+2z
x=4z-4
Now substitute this to second equation:
-x+4y+3z=5
-(4z-4) + 4(2z-5) +3z=5
-4z+4+8z-20+3z=5
7z-16=5
7z=21 /:7
z=3
And count rest:
x=4z-4 = 4*3-4=8
y=2z-5=2*3-5=1
So the solution is:
Ответ: