BIG 100 POINTS, need this for a test asap... PLEASE HELP

7. Wendy is trying to find two numbers with a sum of 496 and a difference of 238. What are the two numbers she is looking for?

8. Ralph bought a variety of 35 donuts. One type cost $2.35 per donut while the other cost $1.75 per donut. He spent $69.05. How many of each type of donut did Ralph buy?