Jawabanmu

2014-01-28T20:49:37+07:00
(2x + 1) + (2x + 2) + (2x + 3) +...+(2x + 50) = 4275
= (2x) x 50 + (1 + 2 + 3 +...+ 50)
= 100x + 1275
100x = 4275 - 1275
100x = 3000
     x =  \frac{3000}{100}
     x = 30

jadi, nilai x adalah 30
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