Question

4:(x-3)+2=1,8.......

Answer 1

4:(x - 3) + 2 = 1,8
4:(x - 3) = 1,8 - 2
4:(x - 3) = -0,2
4 = -0,2(x - 3)
-4 = 0,2x - 0,6
0,2x = -4 + 0,6
0,2x = -3,4 
x = -17

Answer 2

Ну тут не очень понятно вы написали, поэтому я напишу оба варианта решений:
1)4:(х-3)+2=1,8
4:(х-3)=-0,2
х-3=4:(-0,2)
х-3=40:(-2)
х-3=-20
х=-17
2)4:(х-3)+2=1,(8)
4:(х-3)=1,(8)-2
4:(х-3)= $1 \frac89$-2
$4:(x-3)=- \frac19\\ x-3=4:(- \frac19)\\ x-3=-36\\ x=-36+3\\ x=-33$

Answer 3

It seems like you've provided an equation that starts with "4:(x-3)+2=1" and then there's "8......". It's not clear what the context or continuation of the equation is. Could you please provide more information or clarify the equation you're trying to solve? Specifically, what comes after the "8......"? This will help me better understand the equation and assist you in solving it.