1) 3log_3(x)+3log_x(3)=10 \\ \\
3(log_3(x)+log_x(3))=10 \\ \\
3(log_3(x)+ \frac{log_3(3)}{log_3(x)})=10 \\ \\
3(log_3(x)+ \frac{1}{log_3(x)}=10 \\ \\
3log_3(x)+ \frac{3}{log_3(x)}=10 \\ \\
3AMEHA:t=log_3(x) \\ \\
3t+ \frac{3}{t} =10 \\ \\
t=3 \\
t= \frac{1}{3} \\ \\
log_3(x)=3 \\
log_3(x)= \frac{1}{3} \\ \\
x=3^{3}=27 \\
x=3^{ \frac{1}{3}}= \sqrt[3]{3} 2)3log_7(x)-2log_x(7)=1 \\ \\
3log_7(x)-2* \frac{log_7(7)}{log_7(x)} =1 \\ \\
3log_7(x)- \frac{2}{log_7(x)} =1 \\ \\
3AMEHA:t=log_7(x) \\ \\
3t- \frac{2}{t}=1 \\ \\
t=1 \\
t=- \frac{2}{3} \\ \\
log_7(x)=1 \\
log_7(x)=- \frac{2}{3} \\ \\
x=7^{1}=7 \\
x=7^{ -\frac{2}{3}}= \frac{ \sqrt[3]{7} }{7}