Sagot :
1) ağaç sayısı x olsun. (x/2 + 3)3 - 2 = 19
3x/2 + 9 = 21
3x/2 =12
3x=24
x=8 olur.
2)kalemin fiyatı x olsun. (x-300)4 = 200
4x-1200=200
4x=1400
x=350
3)koyun=x keçi=y x=(y+8)7
x=7y+56 dır. o halde 1 koyun yerine 7y+56 yazabiliriz
7y+56=217
7y=161
y=23
1) 19*2 38
38-3 35
35-2 33
33:3 11
2) 200*4 800
800+300 1200
3) 217:7 31
31-8 23
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