Jawabanmu

2014-05-07T06:14:18+07:00
201+x/9=26
201+x=9*26
201+x=234
x=234-201
x=33
2014-05-07T06:14:53+07:00
Rata-rata =  \frac{23 + 28 + x + 12 + 19 + 45 + 34 + 22 + 18}{9}
26 =  \frac{201 + x}{9}
26 . 9 = 201 + x
234 = 201 + x
x = 234 - 201
x = 33
2 5 2