Ineed .i need it for real. like for real need .for all questions

Can someone me do math because i am having a breakdown rn because i don’t get it

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio

How do i i solve this equation? -18 = x/3 + 3