\(2^{x+3}+2^{x+5}=160\)
\(\Rightarrow2^x\cdot8+2^x\cdot32=160\)
\(\Rightarrow2^x\cdot\left(8+32\right)=160\)
\(\Rightarrow2^x\cdot40=160\)
\(\Rightarrow2^x=160:40\)
\(\Rightarrow2^x=4\)
\(\Rightarrow2^x=2^2\)
\(\Rightarrow x=2\)
Vậy...
\(2^{x+3}+2^{x+5}=160\)
\(2^x.2^3+2^x.2^5=160\)
\(2^x.\left(2^3+2^5\right)=160\)
\(2^x.\left(8+32\right)=160\)
\(2^x.40=160\)
\(2^x=160:40\)
\(2^x=4\)
\(2^x=2^2\)
\(x=2\)
Vậy.....