Solve the Problem by Writing and Solving a Suitable System $17.5 \%$

Solve the problem by writing and solving a suitable system of equations.
-A chemistry department wants to make 3 liters of a $17.5 \%$ basic solution by mixing a $20 \%$ solution with a $15 \%$ solution. How many liters of each type of basic solution should be used to produce the $17.5 \%$ solution?

A) 1 liter of $15 \%$ and 2 liters of $20 \%$
B) 1.5 liters of each
C) 2 liters of $15 \%$ and 1 liter of $20 \%$
D) 0.5 liter of $15 \%$ and 2.5 liters of $20 \%$