Sửa lại
<=>2x+2x.23=144
<=>2x(1+23)=144
<=>2x.9=144
<=>2x=144:9=16=24
=>x=4
<=>2x+2x.23=144
<=>2x(1+23)=144
<=>2x.9=144
<=>2x=144:9=16=24
=>x=4
\(2^x+2^{x+3}=144\)
\(\Leftrightarrow2^x.\left(1+2^3\right)=144\)
\(\Leftrightarrow2^x.9=144\)
\(\Leftrightarrow2^x=144:9\)
\(\Leftrightarrow2^x=16\)
\(\Leftrightarrow x=4\)
\(2^x+2^{x+3}\)
\(2^x\left(1+2^3\right)\)
\(2^x.9=144\)
=>\(2^x=144:9=16\)
=>x=8