Question 254975
.20x +.60(40-x)= .30*40
There you go. Now all you have to do is multiply everything out and solve for x and 40-x.
Remember that x is the amount of 20% solution and 40-x is the 60% solution.
Most people have trouble setting up the equations but can do the math.

BTW I lost confidence in your ability to copy when I saw "exactialy." Exactly is the right spelling. Why is spelling important in math? It has to do with paying attention to details. Math especially word problems is about details. Spelling  is a detail.