Answer:
x=-1,y=-4
Step-by-step explanation:
x-y=3...(1)
7x-y=-3..(2)
From (1) make x the subject of formula by adding y to both sides
x=3+y..(3)
Substitute (3) into (2)
7(3+y)-y=-3
Open the bracket
21+7y-y=-3
21+6y=-3
Substrate 21 from both sides
6y=-24
Divide both sides by 6
y=-4
Substitute the value of y into (3)
x=3-4
x=-1
Therefore x is-1 and y is -4
