Пожалуйста помогите!!!

1) $2^{4-6x}=2^7;4-6x=7;-6x=3;x=-0.5$
2) $7^{1.2x+0.6}=7^{-3};1.2x+0.6=-3;1.2x=-3.6;x=-3$
3) $10^{2x+16}=10^{-3};2x+16=-3;2x=-19;x=-9.5$
4) $5^{-4x-8}=5^{1.5};-4x=9.5;x=-2 \frac{3}{8}$
5) $5^{1.5}*5^x-5^{-0.5}*5^x=600;5^x*(5^{1.5}-5^{-0.5})=600;$
$5^x*(5 \sqrt{5} - \frac{1}{ \sqrt{5} } )=600; 5^x*( \frac{24}{ \sqrt{5}} )=600; 5^x=25 \sqrt{5} ;5^x=5^{2.5};x=2.5$
6) $16*2^{2x}-33*2^x+2=0$
$2^x=t$
$16t^2-33t+2=0;t_1= \frac{1}{16} ;t_2=2$
$2^x=1/16;2^x=2^{-4};x=-4$
$2^x=2;2^x=2^1;x=1$
7) $16^x \geq 16^{- \frac{1}{4} };x \geq - \frac{1}{4}$
8) $3^x\ \textgreater \ \frac{1}{81} ;3^x\ \textgreater \ 3^{-4};x\ \textgreater \ -4$
9) $4*2^x+2^x=20;5*2^x=20;2^x=4;2^x=2^2;x=2$
10) $\left \{ {{2x-y=1} \atop {5^{x+y}}=5^2} \right. ; \left \{ {{2x-y=1} \atop {x+y}=2} \right. ;\left \{ {{3x=3} \atop {x+y}=2} \right. ;x=1;y=1$