Algebra 2 is confusing! Will mark you brainliest! Pls help!

Write an equation, solve it, then answer the question.

1) twice a number increased by 5 is 31. what is the number?

2) The quotient of a number and 3 is 12. What is the number?

3) 18 is 6 times the difference of a number and 7. What is the number?

4) 25 less than a number is 41. What is the number?