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

If im understanding your post this is what i get

y − 4x = 72

+ y + 4x = 2

_________

2y= 74

Y= 72/2

Y= 36

y − 4x = 72

35-4x=72

-4x=72-35

-4x=37

X= 37/-4

X= - 37/4 or -9.25

Answer in point (-37/4, 36)

Answer 2

Answer:

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

Step-by-step 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 $(-1,3)$