equation a: y = 4 β 2z
![subject](/tpl/images/cats/mat.png)
Mathematics, 21.12.2019 19:31 ashiteru123
The work of a student to solve a set of equations is shown:
equation a: y = 4 β 2z
equation b: 4y = 2 β 4z
step 1: β4(y) = β4(4 β 2z) [equation a is multiplied by β4.]
4y = 2 β 4z [equation b]
step 2: β4y = 4 β 2z [equation a in step 1 is simplified.]
4y = 2 β 4z [equation b]
step 3: 0 = 6 β 6z [equations in step 2 are added.]
step 4: 6z = 6
step 5: z = 1
in which step did the student first make an error?
step 1
step 3
step 4
step 2
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/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 19:00
Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:00
From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:30
For the feasibility region shown below find the maximum value of the function p=3x+2y
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 00:10
How do i take any fraction and make it into a decimal or percentage?
Answers: 1
You know the right answer?
The work of a student to solve a set of equations is shown:
equation a: y = 4 β 2z
equation a: y = 4 β 2z
Questions
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/istoriya.png)
History, 01.08.2019 01:00
![question](/tpl/images/cats/es.png)
Spanish, 01.08.2019 01:00
![question](/tpl/images/cats/health.png)
Health, 01.08.2019 01:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 01.08.2019 01:00
![question](/tpl/images/cats/health.png)
Health, 01.08.2019 01:00