Tìm (x), biết:

a) \(38 - 2x = 14\)

\(2x = 38 - 14\)

\(2x = 24\)

\(x = 12\)

Vậy \(x = 12\).

b) \(2\left( {x + 17} \right) = 289 - \left( {36 + 289} \right)\)

\(2\left( {x + 17} \right) = 289 - 36 - 289\)

\(2\left( {x + 17} \right) =  - 36\)

\(x + 17 =  - 18\)

\(x =  - 35\)

Vậy \(x =  - 35\).

c) \({2^{x + 3}}{.2^2} = {2^2}.3 + 52\)

\({2^{x + 5}} = 4.3 + 52\)

\({2^{x + 5}} = 64 = {2^6}\)

\({2^{x + 5}} = {2^6}\)

Suy ra \(x + 5 = 6\)

\(x = 1\)

Vậy \(x = 1\).