👤

[tex]9 ^{3-5x}*7 ^{5x-3} =1[/tex]

Răspuns :

9^(3-5x)*7^(5x-3)=1 <=> (1/9^(5x-3))*7^(5x-3)=1 <=> (7/9)^(5x-3)=1 <=> 5x-3=0 <=> x=3/5.