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MissWen
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Ex:1


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Ex1Dau CoroanaVa Rog class=

Răspuns :

Albatran
{...}=18:2
{...}=9
99:[....]=9
[...]=99:9
[....]=11

4+(3-a)x2+1=11
5 +(3-a)x2=11
(3-a)x2=11-5
(3-a)x2=6
(3-a)=6:2
3-a=3
a=0


Verificare
2x{99:[4+3*2+1]}=18
2x [99:11}=18
2x9=18
18=18, adevarat, bine rezolvat
Didi12342
2×{99:[4+(3-a)×2+1]} = 18
99:[4+(3-a)×2+1]} = 18 : 2
99:[4+(3-a)×2+1]} = 9
4+(3-a)×2+1 = 99 : 9
4+(3-a)×2+1 = 11
(3-a) × 2 = 11 - 5
(3-a) × 2 = 6
3 - a = 6 : 2
3 - a = 3
a = 3 - 3
a = 0

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