Sagot :
Cevap: tümler 90 dereceydi biri 5 katsa ona x derim ve -30 dersin 90 ı 5 e böl 18 onada 30 ekle 48 iyi dersler dilerim.
Cevap:
20
Adım adım açıklama:
90 - x = 5x - 30
-x -5x = - 30 -90
-6x = -120
x =-120\-6
= 20
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