Ihave problems understanding systems variable like this example
4x - 2y +z =8
-y +z=4<...
![subject](/tpl/images/cats/mat.png)
Mathematics, 18.09.2019 03:40 reeceslife481
Ihave problems understanding systems variable like this example
4x - 2y +z =8
-y +z=4
2z= 4
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 18:00
10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:00
Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:30
Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 02:10
What is 4(x2 – 3x) + 12x2 + x simplified? f 4x2–3x h 16x2–11x g13x2–2x i16x2–12x
Answers: 1
You know the right answer?
Questions
![question](/tpl/images/cats/himiya.png)
Chemistry, 28.02.2021 23:40
![question](/tpl/images/cats/mat.png)
Mathematics, 28.02.2021 23:40
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 28.02.2021 23:40
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/istoriya.png)
History, 28.02.2021 23:40
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 28.02.2021 23:50
![question](/tpl/images/cats/istoriya.png)
History, 28.02.2021 23:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 28.02.2021 23:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 28.02.2021 23:50
![question](/tpl/images/cats/mat.png)
Mathematics, 28.02.2021 23:50
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 28.02.2021 23:50
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 28.02.2021 23:50
![question](/tpl/images/cats/mat.png)
Mathematics, 28.02.2021 23:50