Question

(102,85 - 2x) : 0,5 = 23,1; срочно

Answer 1

(2057-2х):1/2=23,1
——————
20

(2057-2х)*2=23,1
_________
20

2057-4х=23,1
————
10

-4х=23,1-2057/10
-4х=231/10-2057/10
-4х=-913/5
х=45 13/20≈45,65