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Rzqust [24]
3 years ago
9

When providing information gathered from research you must

English
2 answers:
kolezko [41]3 years ago
5 0
Cite where you got the information from
kati45 [8]3 years ago
4 0
Cite your answer and give backup detail
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Given the system of linear equations. Choose all of the options that could be used to solve the system using addition
myrzilka [38]
<h2>Hello!</h2>

The answer is:

The only operations that could be used to solve the system using addition are the first and the third operation.

<h2>Why?</h2>

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!

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Narrative writing is best described as an account of a sequence of fictional or nonfictional events, usually in chronological order. It is a story created in constructive format. The main characteristics of narrative writing are the plot, the characters, the setting, the structure and the theme.

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