- 31
- 32
- 33
- 34
- c
-
Suppose Number is x
Double of X= 2x
Addition of 15= 2x+15
Result=81
2x+15=81
2x=81-15
x=66/2=33
Suppose Number is x
Double of X= 2x
Addition of 15= 2x+15
Result=81
2x+15=81
2x=81-15
x=66/2=33