3х+7х+18=178

3х+7х+18=178

  • 10x=178-18

    10x=160

    x=160:10

    x=16

  • 3х + 7х + 18 = 178,10х + 18 = 178,10х = 178 18,10х = 160,х = 160 : 10,х = 16,Ответ: х = 16.