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Suntunnoob
a fost răspuns

Afla numarul necunoscut din fiecare egalitate.
a)a+820=3175
b-5371=3146

b)9402-c=6305
4200+d=7000

c)8000-2570-x=1500
3640+1917+y=7872

coroana!!!

Răspuns :

Ginato2008
a) a+820=3175
a=3175-820
a=2355

b-5371=3146
b=3146+5371
b=8517

b)9402-c=6305
c=9402-6305
c=3097

4200+b=7000
b=7000-4200
b=2800

c)8000-2570-x=1500
8000-x=1500+2570
8000-x=3670
x=8000-3650
x=4350

3640+1917+y=7872
3640+y=7872-1917
3640+y=5955
y=5955-3640
y=2315

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