SOLUTION: During 1 term, Rachel took 2 math tests. Her mean score was 75. She scored 12 more points on the first test, then on the second test.how many did she score on the second test?

Algebra ->  Average -> SOLUTION: During 1 term, Rachel took 2 math tests. Her mean score was 75. She scored 12 more points on the first test, then on the second test.how many did she score on the second test?      Log On


   

Question 703392:
During 1 term, Rachel took 2 math tests. Her mean score was 75. She scored 12 more points on the first test, then on the second test.how many did she score on the second test?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
(X +X-12)/2=75
(2X-12)/2=75
2X-12=2*75
2X-12=150
2X=150+12
2X=168
X=168/2
X=84 ANS. FOR THE HIGHER SCORE.
84-12=62 ANS. FOR THE LOWER SCORE.
PROOF:
(84+62)/2=75
150/2=75
75=75