Jawabanmu

2014-03-03T20:31:07+07:00
30 . 68 / 30 = 68
(2040 + 5x) / 35 = 69
2040 + 5x = 69 x 35
5x = 2415 - 2040
5x = 375
x = 75
rata2 = 75
2014-03-03T22:24:12+07:00
Ni coret2an sya, jdi nilai rata2 5 org siswa it 75. good luck!