Solve the system using elimination.
x- y = -5
3x + y = 1
a (-1, 4)
b (-3, 4)
c (-1, 2)
d (2, -2)

A (-1, 4)

Step-by-step explanation:

x- y = -5

3x + y = 1

Add the two equations together to eliminate y

x- y = -5

3x + y = 1

4x = -4

Divide by 4

4x/4 = -4/4

x = -1

Now substitute x=-1 into the first equation

-1 -y = -5

Add 1 to each side

-1+1 -y = -5+1

-y = -4

Multiply by -1

y = 4

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

if i put something wrong your not gonna like it so rather not say nothing.