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[(a+5370:30)-639]:[9315:27-(2681+417*28-14019=26

Răspuns :

[tex][(a+5370:30)-639]:[9315:27-(2681+417*28-14019)]=26\\ (a+179-639):[345-(2681+11676-14019)]=26\\ (a-460):[345-(14357-14019)]=26\\ (a-460):(345-338)=26\\ (a-460):7=26\\ a-460=182\\ a=642[/tex]