Answer:
56 pencils and pens
Step-by-step explanation:
3:5 is the ratio, and then put that into a fraction and then make a proportion
3/5=21/x
eCross multiply and divide so do 21*5 divided by 3. This gives us an answer of 35. Now we know we have 35 pens. 35+21, adding the pen and pencil, is 56. You can always also look for relationships, so if you could see that multiplying 7 gives you the answer, than do that to the 5, and then add it together.
