Algebra help:

Annabell has 25 ounces of a 20% boric acid solution which she wishes to dilute to a 10% solution. How much water does she have to add in order to obtain the 10% solution?

Question

Algebra help:

Annabell has 25 ounces of a 20% boric acid solution which she wishes to dilute to a 10% solution. How much water does she have to add in order to obtain the 10% solution?

anonymous · Answer

she has 25 ounces of 20% solution which means at the moment it contains .2 times 25 = 5 ounces of boric acid

lets say she adds x ounces of water.

then she will have 25 + x ounces of liquid with the same 5 ounces of boric acid as she had to begin with.  you want that to be ten percent acid so you want 
$$.1(25+x)=5$$ 
solve that for x and you are done.

need the steps?

anonymous · Answer

yea like i get it but can you please just put the steps too?

anonymous · Answer

hello ?.?

anonymous · Answer

anyone else know it with the steps???

anonymous · Answer

you can multiply both sides by 10 to get rid of the decimal and then write 
$$25+x=50$$ so 
$$x=25$$

anonymous · Answer

oh yea thnx soooooo much <3