Sagot :
a 2 olmalı çnkü eşitlik söz konusu olur ve burdan direk cevap çıkar
ax+3y+8=2x-y+2=0
ax+3y=-8
2x-y=-2
alt tarafı 3le çarp
ax+3y=-8
6x-3y=-6
3yler birbirini götürür
ax+6x=-14
a+6=-14
a=-20
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