Answer:
2
Step-by-step explanation:
add 6 to both sides and it becomes 4c=8 divide 4 by both sides and it becomes c=2
Answer: The answer is 1/2 1/4 and 1/9
Step-by-step explanation: I did it already and i got it right
Answer:
a) 
b)
Step-by-step explanation:
Data
Brine a (Ba)

Brine b (Bb)

we have that per every minute the amount of solution that enters the tank is the same as the one that leaves the tank (15 Lt / min)
, then the amount of salt (y) left in the tank after (t) minutes: 
Finally:
a) 
b) 
being y(t) the amount of salt (y) per unit of time (t)
Y=1 and x=2 because 2+1=3 and 2(x) plus 3(y) is 5