Simplify

7cosec0- 5cosec0+ 2cosec0 -3cosec0
step by step

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

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

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?