14,6*6х-4=56,7- 5,09(8,9+2,5х)
14,6*6х-4= 56,7-5,09(8,9+2,5х) 87,6х-4= 56,7-45,301-12,725х 87,6х+12,725х= 56,7-45,301+4 100,325х= 15,399 х= 15,399:100,325 х= 0,15349115
спосибо большое