Question

Angela’s average for six math tests is 87. On her first four tests she had scores of 93, 87, 82, and 86. On her last test, she scored 4 points lower than she did on her fifth test. What scores did Angela receive on her fifth and sixth tests?

Answer 1

total points for the 6 tests would be 6 *87 = 522

total points of 1st 4 are: 93 + 87 +82 +86 = 348

522 - 348 = 174 points for 5th and 6th tests

174-4 = 170

170/2 = 85

85 +4 = 89

5th test was 89

6th test was 85

Answer 2

93+  87+ 82+ 86 = 348

Angela’s average for six math tests is 87 so 87(6) = 522

522 - 348 = 174

On her last test, she scored 4 points lower than she did on her fifth test.
lets x = her fifth test
last test = x - 4

x + x - 4 = 174
2x = 178
  x = 89

answer
Her fifth test = 89
Last test = 89 - 4 = 85