Juan has put together 325 pieces of a puzzle that has 500 pieces. he can put together 25 pieces every hour. how long will it take him to finish the puzzle?

The answer is 7 hours here is how I solved it. If it's out of 500 pieces and you've already done 325 then lets minus that so we only have to deal with the left over pieces. So 500- 325 which will give you 175 from there let's divide it by 25 to see how many hours it will take. Once you divide you will get 7 you can double check by doing 7 times 25 then add that to 325 to get 500 pieces.

Step-by-step explanation:

thats not a system of equations, that is a solution