460 + 86 . 4 = { x + 200 } . 4
460 + 344 = { x + 200 } : 4
804 = { x + 200 } . 4
x = 200 = 804 : 4
x + 200 = 201
x = 201 - 200
x = 1
a) 460 + 86 . 4 = { x + 200 } . 4
460 + 344 = { x + 200 } . 4
804 = { x + 200 } . 4
x + 200 = 804 : 4
x + 200 = 201
x = 1
b) { x - 128 + 20 } : 192 = 0
{ x - 148 } = 0 . 192
x - 148 = 0
x = 148
c) 3x- 8064 + x = 0
4x - 8064 = 0
4x = 8064
x = 2016
d) ( x + 1 ) ( 3 - x ) ( 2x + 8 ) = 0
\(\Rightarrow\hept{\begin{cases}x+1=0\\3-x=0\\2x+8=0\end{cases}}\)
\(\Rightarrow\hept{\begin{cases}x=0-1\\x=3-0\\2x=-8\end{cases}}\Rightarrow\hept{\begin{cases}x=-1\\x=3\\x=-4\end{cases}}\)
e) 25 + ( 15 . x ) = 30
15 . x = 5
x = 5 : 15
x = 5/15 = 1/3