45+(71-х*9)=80

45+(71-х*9)=80

  • 45+(71-х*9)=80
    71-х9=80-45
    71-х9=35
    71-35=х9
    36=х9
    х=36:9
    х=4
    Проверка
    45+(71-4*9)=80
    45+35=80
    80=80

    (725х-92):36=48*4
    (725х-92):36=192
    725х-92=192*36
    725х-92=6912
    725х=6912+92
    725х=7004
    х=7004:725
    х=9,66

  • 45+(71-х*9)=8045+71-9х=80-9х=-36
    х=4

    (725*х-92):36=48*4

    (725*x-92):36 = 192
    725x:36 = 1751:9
    x = 1751:9 : (725:36)
    x = 7004/725
    х =9.66068965517