let the unknown number be
[tex]=x[/tex]
5 times a number x
[tex]=5x[/tex]
3 more than 5 times a number x means, adding 3 to 5times the number
[tex]5x+3[/tex]
less than 26, means
[tex]<26[/tex]
Combining both expressions,we will have
[tex]5x+3<26[/tex]
Hence,
The final answer is OPTION A
