When solving this system of equations using linear combination, what should you do FIRST? {−x+y=−11
{2x+y=19

A) Solve the first equation for y.

B) Multiply the first equation by -1.

C) Multiply the first equation by -2.

D) Add the two equations together.

Multiply the first equation by -1

Step-by-step explanation:

Here, we ware being asked the step to take to solve the simultaneous equation

What is right here is to multiply the first equation by -1

By multiplying the first equation by -1, we will have it that the value of y in that equation becomes negative

It is from here we can now add both equations together to have only real x terms

10 down (bang1)

5 up

5down (2)

2.5 up

2.5 down (3)

1.25 up

1.25 down (4)

now add them up : )

hoped i lol

answer: 7

step-by-step explanation: