Розв’яжіть рівняння

Розв'яжіть рівняння

  • A) 4x-28 = 0
    4х = 28
    х = 284
    х = 7

    б) 5x + 1.4 = 0
    5х = -1.4
    х = -1.45
    х = -0.28

    в) 6x + 1.8 = 0
    6х = -1.8
    х = -1.86
    х = -0.3

    г) 2x + 3 = 3x-2
    3х-2х = 3 + 2
    х = 5

    д) 2x-1.7 = 0
    2х = 1.7
    х = 1.72
    х = 0.85

    е) x + 9 = 4x + 3
    4х-х = 9-3
    3х = 6
    х = 63
    х = 2

  • 4x - 28 = 0
    4x = 28
    x = 28/4
    x = 7
    ==
    5x + 1.4 = 0
    5x = -1.4
    x = - 0.28
    ==
    6x + 1.8 = 0
    6x = -1.8
    x = -0.3
    ==
    2x + 3 = 3x - 2
    2x - 3x = -2 - 3
    -x = -5
    x = 5
    ==
    2x - 1.7 = 0
    2x = 1.7
    x = 1.7 / 2
    x = 0.85
    ==
    x + 9 = 4x + 3
    x - 4x = 3 - 9
    -3x = -6
    x = 2