Examples of Math Problems
examples of math problems that I like, solved, etc.
Sunday, November 17, 2013
how much of a 30% salt solution must be mixed with 70 gallons of a 12% salt solution to obtain a solution that is 20% of salt?
x(0.3)+(70)(0.12)=(x+70)(0.2)
x(0.3-0.2)=70(0.2-0.12)
x(0.1)=70(0.08)
x=56
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