Answer:
switch your 5 and 6
Step-by-step explanation:
I think the equation would be
53x5=265
also not to be that person, but its *times
Answer:
x+7
Step-by-step explanation:
25x - 6x - 18x + 7
x + 7
Answer:
q=3
Step-by-step explanation:
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)