If John can make 1,638,400 pounds in 530 days, how long would it take to make 50,000 pounds?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong