If five is subtracted from three times a certain number, the result is 10.what is the number?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

I’m really confused and need to learn this

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample