Use addition to solve the system of linear equations. include all of your work in your final answer.
-x - y = 4
x + 2y = 4

x = - 12, y =8

Step-by-step explanation:

The given system of linear equations is expressed as

-x - y = 4 - - - - - - - - - - - - - - 1

x + 2y = 4 - - - - - - - - - - - - - - 2

The first step is to eliminate x by adding equation 1 to equation 2. It becomes

-x + x + - y + 2y = 4 + 4

y = 8

Substituting y = 8 into equation 1, it becomes

-x - 8 = 4

We would add 8 to the left hand side and the right hand side of the equation. It becomes

-x - 8 + 8 = 4 + 8

-x = 12

Dividing the left hand side and the right hand side of the equation by -1, it becomes

- x/ - 1 = 12 / - 1

x = - 12

answer: there are x+184 pages in olivia's book.

step-by-step explanation:

let the total number of pages in the book which olive has already read be x.

then if olive has 184 pages left to read, then the total number of pages are in olive's book= pages she has read+pages she has left to read

therefore, the total number of pages in olivia's book=

hence, there are x+184 pages in olivia's book.

yes

step-by-step explanation: