I don't really know if the question is complete but...
y = x -10 can be a solution
so y would be -7 when x is 3
The answer i got was
n=-3/4,n=-1
That’s what i got
step by step explanation
3. 8 tires for 2 cars = 4 tires for every 1 car
4. (8,2) (12,3) (16,4) (20,5) (24,6) (28,7)
↑
plot these on the graph
6. 8/2=16/4=12/3=20/5
