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34(2y+77x):227+10-4y=

Răspuns :

34[2y+77x]/227+10-4y
⇒68y+2618x/227+10-4y
⇒68y-11,53+10-4y[se reduce y cu y];
⇒68-11,53+10-4
⇒56,47+10-4
⇒66,47-4
⇒62,47;