7*7^x=7^2^3
7^x=7^6/7
7^x=7^5
asadar x=5
[tex]\displaystyle \bf\\7^{x+1}=49^3\\\\7^{x+1}=\Big(7^2\Big)^3\\\\7^{x+1}=7^{2\times3}\\\\7^{x+1}=7^6\\\\x+1=6\\\\x=6-1\\\\\boxed{\bf x=5}[/tex]
