5,128-x) : 4 = 0282
(5,128-х) : 4 = 0,282 (641-125х)/125*1/4=0,282 641-125х=141 -125х=141-641 х=4
(5,128-х):4=0,282 (661-125х)/125*1/4=0,282 641-125х=141 -125x=141-641 -125x=-500 x=–500:(-125) x=4