Question

What is the solution to this system of linear equations?y − 4x = 72y + 4x = 2(3, 1)(1, 3)(3, −1)(−1, 3)

Answer 1

D. (−1, 3)

Explanation:

looked it up

Answer 2

The solution is the point
`(-1,3)`

Explanation:

we have

`y-4x=7` ------> equation A

`2y+4x=2` ------> equation B

Adds equation A and equation B

`y-4x=7\\2y+4x=2\\-------\\y+2y=7+2\\3y=9\\y=3`

Find the value of x

Substitute the value of y in the equation A

`y-4x=7`

`3-4x=7`

`4x=3-7`

`4x=-4`

`x=-1`

The solution is the point
`(-1,3)`