exam Maths Puzzle Numerical Ability

5floz. of a 2% alcohol solution was mixed with 11floz. of a 66% alcohol solution. Find the concentrationof the new mixture.

I need to know how to set the problem up! thanks

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Write an algebraic expression, an equation or an inequality.

The difference of 3 times a number x and 11 Mr. Alzado is selling footballs at his toy store which has a monthly overhead of $23,000 and it cost him $1.50 for each football. He sells the football for $3.50 each. What are the