SOLUTION: How much of 4% acid must be added to 10%acid to get 50ml of 8% acid?

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: How much of 4% acid must be added to 10%acid to get 50ml of 8% acid?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 883012: How much of 4% acid must be added to 10%acid to get 50ml of 8% acid?
Found 2 solutions by josgarithmetic, stanbon:
Answer by josgarithmetic(39618) About Me  (Show Source):
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How much of 4% acid must be added to 10%acid to get 50ml of 8% acid?
-----------------
Equation:
acid + acid = acid
0.04x + 0.10(50-x) = 0.08*50
---------------------------
4x + 10*50 - 10x = 8*50
-6x = -2*50
x = (1/3)50 = 16 2/3 ml (amt. of 4% solution needed)
50-x = 33 1/3 ml (amt of 10% solution needed)
=======================
Cheers,
Stan H.
-----------------------