A chemist needs to mix a 12% acid solution "A" with a "B" solution of 32% to make an 8% liter 20% solution. How much of "A+B" would you need?

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,