 
<translate> Karen nwere naanị mkpụrụ ego dị dọla iri na ise na nke dị dọla iri abụọ n'akpa ego klas ha. Ọnụ ọgụgụ akwụkwọ ego 10 bụ okpukpu abụọ nke akwụkwọ ego 20. Ego ole ka ha nwere na ego ha? Azịza ya bụ 3. <eng> Karen's class fund contains only $10 and $20 bills, which amount to $120. The number of $10 bills is twice as many $20 bills. How many $20 bills do they have in their fund?
The answer is 3 