21 is added to four times - Math Riddle
98.Math Riddles
If 21 is added to four times a number, the result is 57.

- A.9
- B.36
- C.7
- D.4
-
Explanation : 4x + 21 = 57 4x = 36 x = 9
If 21 is added to four times a number, the result is 57.
Explanation : 4x + 21 = 57 4x = 36 x = 9