Question

That's a full question. Please explain how you got that answer. Also this is system of equations. Thank you so much

Answer 1

3x+y=1
-4x+y=-6

3x+y=1
y=4x-6

3x+(4x-6)=1           
y=4x-6

3x+4x-6=1
y=4x-6

3x+4x=1+7
y=4x-6

7x=7
y=4x-6

x=1
y=4x-6

x=1
y=4×1-6=4-6

x=1
y=-2