Sagot :
Zarfa x dersek Kalemde x+20 olur.
70-20=50:2=25
x 25 olur.
Zarf x olduğuna göre cevap 25 olur.
İYİ DERSLER
Cevap:
cevap 45 kolay gelsin
[tex]kalem = x \\ zarf = x + 20 \\ x + x + 20 = 70 \\ 2x + 20 = 70 \\ 2x = 50 \\ x = 25 \\ yanı \: kalem25 \: zarf \: 45 \: lıradır| [/tex]
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