Question

jill is thinking of a number four more than three times the number is thirteen what is the number

Answer 1

Let the number be x.
Three times the number plus four equals 13: 3x + 4 = 13.
Solve: 3x = 9, so x = 3.

Check: 3 times 3 is 9, plus 4 is 13. So the number is 3.