Question 692975
x liters of a 5% salt solution are added to 10 liters of a 2% salt solution.,
 Find the end concentration as a function of x
 How much solution do you end up with?
You end up with (x+10) liters
:
 How much salt does it contain?
let y = the final concentration of salt, in decimal form
.05x + .02(10) = y(x+10)
.05x + .2 = y(x+10)
{{{((.05x + .2))/((x+10))}}} = y
Change to per cent
100*{{{((.05x + .2))/((x+10))}}} = {{{((5x + 20))/((x+10))}}} % is the final concentration of salt