SOLUTION: ON HIS FIRST 5 TEST MARK RECIVED THE FOLLOWING SCORES: 50,62,80,75 AND70.WHAT TEST SCORE MARK EARN ON HIS SIXTH TEST SO THAT HIS AVEARAGE MAEN SCORE FOR ALL SIXTH TEST WILL BE 60

Algebra ->  Average -> SOLUTION: ON HIS FIRST 5 TEST MARK RECIVED THE FOLLOWING SCORES: 50,62,80,75 AND70.WHAT TEST SCORE MARK EARN ON HIS SIXTH TEST SO THAT HIS AVEARAGE MAEN SCORE FOR ALL SIXTH TEST WILL BE 60      Log On


   

Question 892604: ON HIS FIRST 5 TEST MARK RECIVED THE FOLLOWING SCORES: 50,62,80,75 AND70.WHAT TEST SCORE MARK EARN ON HIS SIXTH TEST SO THAT HIS AVEARAGE MAEN SCORE FOR ALL SIXTH TEST WILL BE 60?
Answer by LinnW(1048) About Me  (Show Source):
You can put this solution on YOUR website!
%2850%2B62%2B80%2B75%2B70+%2B+x%29%2F6+=+60
multiply each side by 6
%2850%2B62%2B80%2B75%2B70+%2B+x%29+=+60%2A6
%28337+%2B+x%29+=+360
subtract 337 from each side
x+=+360-337
x+=+23