5 la puterea 56 : 25 la puterea 12-5×(55+x:5)=25 5 la puterea 56:(5 la puterea 5)la puterea 12- 5 × (55+x:5)=25 5 la puterea 56 -5 la puterea 60 -5×(55+x:5)=25 5 la puterea 4 -5×(55+x:5)=25 625-5×(55+x:5)=25 5×(55+x×5)=600 55+x=120 x:5=65 x=65×5 x=325