3x+y=-5
7x+3y=1
I dont know

First we have to make y the same:
3x+y =-5 (times everything by 3)
7x+3y=1 (Times everything by 1)

Because both the signs are + you have to take away that’s a rule.

9x+3y =-15
7x+3y =1
(The 3y cancels out)
2x= -16
x=-8

We then take any equation of the two to find y I picked 7x+3y =1 you substitute the x with -8

7x+3y =1

7x (-8)+ 3y =1

-56+3y=1
(Add 56 to the other side)
3y= 57
y= 19

So x is -8 and y = 19

If you still unsure you can ask me I can explain again

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