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a fost răspuns

521=5x2x1-0:1:3:5+ n
Urgent!!!!!!!!!!!
Dau coroana
4+[4-(4+4:4x4-4)+a}:4=8
b:6x6:3x3=8+8+9:9+13
(h:5-5x9+186:6=400:10
8+6x[4+27: (0+ux9)]=49+10:10
[12-9:3+(12-9):3]xz+1=41
6x(5+4)-o+10=29-7:7
33:(r+19)=80:2:5:4:2
Plizz dau coroana !!(am pus puncte10 in plus)

Răspuns :

MariaFun1
4+[4-(4+4:4×4-4)+a]:4=8
4+[4-(4+1×4-4)+a]:4=8
4+[4-(4+4-4)+a]:4=8
4+[4-(8-4)+a]:4=8
4+(4-4+a) :4=8
4+(0+a): 4=8
(0+a):4=8-4=4
(0+a)=4×4=16
0+a=16
a=0-16
a=16

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