Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is Â ?

Thrice the square of a natural number decreased by 4 times the number

1.	Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is Â ?
A.	5
B.	4
C.	7
D.	6
Answer» B. 4