x ounces + 15 ounces = 15+x ounces in jar
x ounces + .4(15) = .5 (15+x)
x + 6 = 7.5 + .5 x
.5 x = 1.5
x = 3
how much pure acid must be added to 15 ounces of an acid solution which is 40% acid in order to produce a solution which is 50% acid?
3 answers
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