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1, 2 si 3 ......

Ca rog!!!!!!
E urgent!!!!!!
Dau coriana!!!!!​


1 2 Si 3 Ca RogE UrgentDau Coriana class=

Răspuns :

1
x+(-9)=-4=x-9=4=>x=13
x-3=-12=>x=-9
-7x=-28=>x=-4
-108:x=-18=>x=6

2
a+b+c=-9
b=a+2
c=b+2=a+4
a+a+2+a+4=-9
3a=-9-6
a=-15:3
a=-5
b=-3
c=-1

3
2a+(-5)=a+(-3)
2a-5=a-3
2a=a+2
=>a=2

Coroana?