Tìm số tự nhiên x sao cho: a) 208−8.(x+4)=2^3.5 b) 15+5.(x−2018)=3.2^2 .5

* Hướng dẫn giải

a)

$\begin{array}{l}208-8.(x+4)=2^3.5\\ 8.(x+4)=208-40=168\\ x=17\end{array}$

b)

$\begin{array}{l}208-8.(x+4)=2^3.5\\ 8.(x+4)=208-40=168\\ x=17\end{array}$

c) 

$\begin{array}{l}2018.(2019-x)=0\\ x=2019\end{array}$