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[tex]\begin{array}{c|l}\sf128&\sf2\\\sf64&\sf2\\\sf32&\sf2\\\sf16&\sf2\\\sf8&\sf2\\\sf4&\sf2\\\sf2&\sf2\\\sf1\end{array}\Longrightarrow\rm 128=2^7\\\sf2^x=128\\\sf 2^x=2^7\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=7}}}}\blue{\checkmark}[/tex]
