Sagot :
kurşun kalem=x tükenmez kalem=2x 2x+3x=5x 4TL/5=80 KR 3.80=240 kr 4.80=320 kr 320+240=560 kr=5 lira 60 kr
tük.kalemin fiyatına 1 tl desek
kalem 0,5 tl olur
0,5*3+2*1=3,5tl
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