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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
x + y = 7
2x + y = 5



(Could be more than one answer)

1.Multiply the first equation by -1 and add the equations together.

2.Multiply the second equation by -1 and the first equation by -1, then add the equations together.

3.Multiply the second equation by -1 and add the equations together.

4.Multiply the first equation by -2 and add the equations together.

5.Multiply the first equation by 2 and the second equation by -1, then add the equations together.

Respuesta :

Answer:

Option 1, Option 3, Option 4, Option 5

Step-by-step explanation:

Here two equations are given,

x + y = 7    ----------(1)

2x + y = 5  ---------(2)

Check option 1

Multiply the first equation by -1 and add the equations together.

-x - y = -7

2x+y = 5    correct

Similarly,

Option 1, Option 3, Option 4 and Option 5 are correct.

That's the final answer.

I hove it will helps you.

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