Решите уравнение:б)4,58х+2,42х=7,14;в)7,14х+17,86х=38;г)199,29х-119,29х=72.

  • б)4,58х+2,42х=7,14
    7х=7,14
    х=7,14:7
    х=1,02

    4,58*1,02+2,42*1,02=7,14
    4,6716+2,4684=7,14
    7,14=7,14

    в)7,14х+17,86х=38
    25х=38
    х=38:25
    х=1,52

    7,14*1,52+17,86*1,52=38
    10,8528+27,1472=38
    38=38

    г)199,29х-119,29х=72
    80х=72
    х=72:80
    х=0,9

    199,29*0,9-119,29*0,9=72
    179,361-107,361=72
    72=72


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