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А) 4-6*(х+)=3-5х
Б)(5х+8)-(8х+14)=9
В)2,7+у=9*(у-2,1)
Г)0,3*(8-3у)=3,2-0,8*(у-7)
Д)5/6*(1/3х-1/5)=3х+3 1/3

  • б) 5х+8-8х-14=9       в)2,7+у=9у-18,9        г)2,4-0,9у=3,2-0,8у+5,6      д)5/18х-1/6=3х+10/3
        -3х=15                       -8у=-21,6                  -0,1у=6,4                             49/18х=21/6
          х=-5                            у=2,7                       у=-64                                    х=9/7
                                                                                                                            х=1целая2/7
  • А) 4-6*(х+2)=3-5х
    4-6х-12=3-5х
    -6х+5х=3-4+12
    -х=11
    х=-11

    Б)(5х+8)-(8х+14)=9
    5х+8-8х-14=9
    5х-8х=9-8+14
    -3х=15
    х=15:(-3)
    х=-5

    В)2,7+у=9*(у-2,1)
    2.7+у=9у-18.9
    у-9у=-18.9-2.7
    -8у=-21.6
    у=-21.6:(-8)
    у=2.7

    Г)0,3*(8-3у)=3,2-0,8*(у-7)
    2.4-0.9у=3.2-0.8у+5.6
    -0.9у+0.8у=3.2+5.6-2.4
    -0.1у=6.4
    у=6.4:(-0.1)
    у=-64

    Д)5/6*(1/3х-1/5)=3х+3 1/3
    518х-16=3х+103
    518х-3х=103+16
    518х-5418х=206+16
    -4918х=216
    х=216*(-1849)
    х=-97
    х=-1 27