Question

Answer 1

a: =>x-9=70

=>x=79

b: =>6x=68-8=60

=>x=10

c: =>x(x⁶⁹⁹-1)=0

=>x=0 hoặc x=1

Answer 2

a, 5( x - 9 ) = 350

      ( x - 9 ) = 350 : 5

      ( x - 9 ) = 70

        x         = 70 + 9

        x         = 79

b, 4x + 2x = 68 - 2³

    x . ( 4 + 2 ) = 60

    x . 6 = 60

    x      = 60 : 6

    x      = 10

Answer 3

a, 5 ( x - 9 ) = 350

      ( x - 9 ) = 350 : 5

      ( x - 9 ) = 70

        x         = 70 + 9

        x         = 79

b, 4x + 2x = 68 - 2³

    x . ( 4 + 2 ) = 60

    x . 6 = 60

    x      = 60 : 6

    x      = 10

c, x ( x⁶⁹⁹ - 1) = 0

=> x = 0 hoặc x = 1