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[(a+260:2)X3+3]+5-12=1997
[(b+270:3)X5+100]=600
15-(8+4xc):5=11
40+50:[9+48:(d+6)]=46
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Răspuns :

[(a+260:2)X3+3]+5-12=1997
(a+130)x3+3=1997+12-5
(a+130)x3+3=2004
(a+130)x3=2001
a+130=2001:3
a+130=667
a=667-130
a=537

(b+270:3)x5+100=600
(b+90)x5=500
b+90=500:5
b=100-90
b=10

15-(8+4xc):5=11
(8+4xc):5=15-11
8+4xc=4x5
4xc=20-8
c=12:4
c=3



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