Help ex 39 plssssssss
![Help Ex 39 Plssssssss class=](https://ro-static.z-dn.net/files/dd4/ad7d825e337d34fe10ad01a32ed73208.jpg)
5^n+2+3×5^n+1-5n=975
5^n×5²+3×5^n×5-5^n=975
5^n×25+3×5^n×5-5^n=975
5^n×(25+3×5-1)=975
5^n×(25+15-1)=975
5^n×39=975
5^n=975:39
5^n=25
n=2 deoarece 5²=25
bafta! :)