Instead of doing it for you, I'm changing all the numbers so
you can do yours exactly the same way I did this one step by step.
I'm changing it to this problem:
How many terms are there between 329 and 843 of an arithmetic
sequence 9n+7 ?
We know that the terms are between 329 and 843, so we write:
Subtract 7 from all three sides
Divide all three sides through by 9
Since n is an integer,
There are 92 integers 1 through 92.
We can't use the first 35 integers 1 through 35,
So there are 92-35 or 57 terms between 329 and 843 of
an arithmetic sequence 9n+7
Now you do yours exactly the same way step by step.
Edwin