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5la puterea 4:5 la puterea2+5·(55-x:5)=5la puterea 3

Răspuns :

Emma007
5^4:5^2+5×(55-x:5)=5^3
5^4-2+5×(55-x:5)= 125
5^2+5×(55-x:5)=125
5×5+5×(55-x:5)=125
25+5×(55-x:5)=125
5×(55-x:5)=125-25
5×(55-x:5)=100
55-x:5=100:5
55-x:5=20
x:5=55-20
x:5=35
x=35:5
x=7

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