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Afla valoarea lui a:
27:[26+(6*a-7*3):9]+(13-2*2*3)=2


Răspuns :

[tex]\rm 27:[26+(6a-7\cdot3):9]+(13-2\cdot2\cdot3)=2 \\ \\ 27:[26+(6a-21):9]+(13-12)=2 \\ \\ 27:[26+(6a-21):9]+1=2|-1 \\ \\ 27:[26+(6a-21):9]=1 \\ \\ 26+(6a-21):9=27|-26 \\ \\ (6a-21):9=1|\cdot9 \\ \\ 6a-21=9|+21 \\ \\ 6a=30|:6 \\ \\ \bold{a=5}[/tex]