a.\(2^x-2^4.2^7.32=0\)
\(2^x-2^{16}=0\)
\(=>x=16\)
b.\(3^x+3^{x+2}=270\)
\(3^x+3^x.3^2=270\)
\(3^x.10=270\)
\(3^x=27\)
\(=>x=3\)
 

1.will go
2.practices
3.reading
4.doesn't have
5.does
6.chatting
7.cooking
8.are wear
9.am listening
 

33B
34B
35C
36A
37B
38D
39A
40B

\(2^{2016}.2^{x-1}=2^{2015}\)
\(2^{x-1}=\dfrac{2^{2015}}{2^{2016}}\)

\(x\in B\left(7\right)\)

\(9x-7^2=2^5\)
\(9x=2^5+7^2=32+49=81\)
\(x=9\)

A

A

B