Question

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.

Answer 1

Option 1, Option 3, Option 4, Option 5

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.