Please help a girl out I'm so confused

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

1c) the number 131 is a term in the sequence defined by the explicit rule f(n)=5n-4. which term in the sequence is 131? 2a) write the first four terms of the function f(n)=n^2-1 2b) what is the 10th term of the sequence defined by the explicit rule f(n)=n^2-1 2c) the number 224 is a term in the sequence defined by the explicit rule f(n)=n^2-1. which term in the sequence is 224?

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.