When 47 is added to a number the result is 37 less than 7 times the number

47 is added to a number ⇒ 47 + x
37 less than 7 times the number ⇒ 7x - 37

47 + x = 7x - 37

x - 7x = -37 - 47
- 6x = -84
x = -84 / -6
x = 14 

The value of the unknown number is 14.

47 + x = 7x - 37
47 + 14 = 7(14) - 37
61 = 98 - 37
61 = 61