Sagot :
Cevap:
-4
Adım adım açıklama:
-20 yi karşıya atarız. +20 olur
60+20=80 olur. Yeni denklem:
-5m=15m+80
15m yi de karşıya atarız -15 olur.
-5+(-15)= -20 olur. Yeni denklem:
-20m=80
m=-4
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