\(4^2.n-3.2^4=2^4.2^2\Leftrightarrow4^2.n=2^4.2^2+2^4.3\)
\(4^2.n=2^4.\left(2^2+3\right)=2^4.\left(4+3\right)=2^4.7\)
\(\left(2^2\right)^2.n=2^4.7\Leftrightarrow2^4.n=2^4.7\Rightarrow n=7\)
Tìm n biết:
42. n - 3.24 = 24. 22
(22)2 . n - 3.24 = 24. 22
24. n - 3.24 = 24. 4
24.(n - 3) = 24 .4
\(\Leftrightarrow\) n - 3 = 4
\(\Rightarrow\) n = 7
\(4^2.n-3.2^4=2^4.2^2\)
\(\Leftrightarrow16.n-3.16=64\)
\(\Leftrightarrow16n=64+48\)
\(\Leftrightarrow16n=112\)
\(\Rightarrow n=112:16\)
\(\Rightarrow n=7\)
