1) РЕШИТЕ УРАВНЕНИЯ (X*6):8=80 2) 786-(x-273)=129 3) 34*x-12=280 4) 2400:(317+x)=3

(X*6):8=806x:8=806x=80*86x=640x=640:6x= 106.6786-(x-273)=129786-x+273=129-x=129-1059-x=-930x=93034*x-12=28034x=280+1234x=292x=8.62400:(317+x)=3317+x=2400/3317+x=800x= 800-317x=483