Algebra word problem

Mathematics
Tutor: None Selected Time limit: 1 Day

In a chemistry class, 3 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution.  How many liters of the 10% solution are needed?

Apr 28th, 2015

(3*4+b*10)/(3+b)  =6      Crossmultiplying              3*4+b*10=6(3+b). 12+10b=18+6b; 10b=6+6b; 4b=6; b=3/2.  Thus we need 1.5 liters of 10% solution.

Apr 28th, 2015

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