$9500 is​ invested, part of it at 12​% and part of it at 7​%. For a certain​ year, the total yield is ​$960.00. How much was invested at each​ rate?

Question

PLEASE HELP

Answer 1

if x is at 12%, then the rest (9500-x) is at 7%.

so, add up the interest for each part. The sum must be 960.00