You answer would be 50/3 or 16 2/3. If you have learned about cross-multiplying, you would set it up as 5/3=x/10; then 5*10=3*x; You would get x alone, getting your answer. If you have NOT learned cross-multiplication, you divide 10 by 3, getting 3 1/3 or 10/3; then multiply by 5, getting your answer. I hope this helps!!!