Three less than seven times a number
to write it in terms of expression
Let us assume that the number is x
now it says
seven times a number
So it becomes 7x
and then it says
three less than seven times a number
that is 3 less than 7x
It means we have to subtract 3 from 7x
So final answer should be
7x-3
Second option is correct 7x-3