Hi guys can you please follow me

To solve the problem, we need to check and discard each of the given option to see if the operations works to solve the system using addition, so, trying the given options.

The system of equation is:

$x+y=7\\12x+y=5$

We can see that the only way to solve the system using addition, is multiplying the first or the second equation by -1, so, we can eliminate the variable "y", let's prove that:

- First operation: Multiplying<u> the first equation</u> by -1 and add the equations together,

$x+y=7\\12x+y=5$

$x*(-1)+y*(-1)=7*(-1)\\12x+y=5$

$-x+-y=-7\\12x+y=5$

Adding the equations, we have:

$12x-x+y-y=5-7$

$11x+=5-7$

$11x+=-2$

$x=-\frac{2}{11}$

We can see that we can solve the problem using the first operation the operation.

- Third operation: Multiplying <u>the second equation</u> by -1 and add the equations together,

$x+y=7\\12x+y=5$

$x+y=7\\12x*(-1)+y*(-1)=5*(-1)$

$x+y=7\\-12x+-y=-5$

Adding the equations we have:

$-12x+x+y-y=-5+7$

$-11x=2$

$x=-\frac{2}{11}$

We can see that we can solve the problem using the third operation.

Also, we can see that in both equations the variable "y" has the same coefficient, the only operations that could work to solve the system using addition are the first and the third operation.

Have a nice day!

8 0

3 years ago

In annotating a text the first step is to highlight or underline important ideas. What is the next step?

Triss [41]

In annotating a text the first step is to highlight or underline important ideas, the next step will be identify key concepts and phrases.

<h3>What is an annotation?</h3>

It should be noted that an annotation is extra information that is associated with a particular point that is in a document or other piece of information. Annotation can be a note that includes a comment or explanation and can be presented in the margin of book pages.

The ways to annotate include:

Summarize key points in your own words.
Then circle key concepts and phrases.
Write the brief comments and questions in the margins.
Use abbreviations and symbols.
Highligh or underline.

Therefore, in annotating a text the first step is to highlight or underline important ideas, the next step will be identify key concepts and phrases.

Learn more about annotations on:

brainly.com/question/13200433

#SPJ1

7 0

2 years ago

MARKING BRAINLIEST IF RIGHT, NO ABSURD ANSWERS

notka56 [123]

Answer:

I feel like all of these are bad so D.)

5 0

3 years ago

Hi guys can you please follow me​

Hi guys can you please follow me