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2q+3q+3-4=9
5q+(-1)=9
5q=9+1
5q=10
q=2
2. 3-q+4q-20=-5
-q+4q+3-20=-5
3q+(-17)=-5
3q=-5+17
3q=12
q=4
no 3 dan 4 nanti saya bntu, coba km selesaikan sndri