Seven subtracted from 3 times a number is equal to 9 more than 5 times the number. what is the number?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document