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B×d+c:d
6b-a+9c-c
a+3=b×5=c-35=d×7=35


Răspuns :

a=35-3=32

b=35:5=7

c=35+35=70

d=35:7=5

b×d+c:d=7×5+70:7=35+10=45

6b-a+9c-c=6×7-32+8×70=42-32+560=570