Find the sum of the even numbers between 199 to 1999

Will mark brainliest if you answer ! the taco shop sold 198 lunches friday. this number is 3 more than 3 times the number they sold monday. let n represent the number of lunches sold monday. which equation shows an equality between two different ways of expressing the number of lunches sold on friday? a. n – 3 = 198 b. 3n – 3 = 198 c. 3n + 3 = 198 d. n + 3 = 198

Having a hard time understanding this question (see attachment).

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.