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12500-a=3642. b+421000=509201. C-(28+16-9)=300. 48-12+d=1904

Răspuns :

1.12500-3642=a
8858=a
2.b=509201-421000=88201
3.c-35=300
c=300+35=335
4.36+d=1904
d=1904-36=1868
12500-a=3642
a=12500-3642
a=8858

b+421000=509201
b=509201-421000
b=88201

c-(28+16-9)=300
c-(44-9)=300
c-35=300
c=300+35
c=335

48-12+d=1904
36+d=1904
d=1904-36
d=1868

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