Get premium membership and access questions with answers, video lessons as well as revision papers.

Given that x = 2, find the values of y and z for the equations:

      

Given that x = 2, find the values of y and z for the equations:
x + y - z = -1 and
x - 2y + z = -7.

  

Answers


John
Substitute x = 2 in the two equations

2 + y - z = - 1

y - z = -3

2 - 2y + z = -7

-2y + z = -9

Add the resulting equations to have

-y = -3 - 9;

-y = -12

y = 12

Substitute y = 12 in either of the two equations

12 - z = -3

-z = -3 - 12

-z = -15;

z = 15
johnmulu answered the question on June 8, 2017 at 06:58


Next: What are tides?
Previous: What are the causes of ocean currents?

View More Mathematics Questions and Answers | Return to Questions Index


Learn High School English on YouTube

Related Questions