Помогите пожалуйста решить уравнения: 35) 1) 10x + 7 = 8x – 9; 2) 20 – 3x = 2x – 45; 3) 2,7+1,9x = 2x – 1,5;

Question

Помогите пожалуйста решить уравнения:

35) 1) 10x + 7 = 8x – 9;
2) 20 – 3x = 2x – 45;
3) 2,7+1,9x = 2x – 1,5;

37) 1) -3(x-4)=5x-12;
2) (16x-5)-(3-5x) = 6;
3) 26-4x=3x-7(x-3);
4) -2 (3-4x) + 5 (2-1,6x)=4;

38) 1) 4 (13-3x) – 17= -5x;
2) (18-3x) – (4 + 2x) =10;
3) 14-x=0,5(4-2x) + 12;
4) 4x – 3 (20-x)=10x – 3 (11+x).​​

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Remi 1 год 2021-09-23T13:12:55+00:00 1 Answers 0 views 0

Answers ( )

  1. Faith
    0
    2021-09-23T13:14:43+00:00
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    Ответ:

    1)

    10x - 8x = - 9 - 7 \\ 2x = - 16 \\ x = - 8

    2)

    Объяснение:

    20 - 3x = 2x - 45 \\ - 3x - 2x = - 45 - 20 \\ - 5x = - 65 \\ x = 13

    3)

    2.7 + 1.9x = 2x - 1.5 \\ 1.9x - 2x = - 1.5 - 2.7 \\ - 0.1x = - 4.2 \\ x = 42

    1)

    - 3(x - 4) = 5x - 12 \\ - 3x + 12 = 5x - 12 \\ - 3x- 5x = - 12 - 12 \\ - 8x = - 24 \\ x = 3

    2)

    (16x - 5) - (3 - 5x) = 6 \\ 16x - 5 - 3 +5x = 6 \\ 21x - 8 = 6 \\ 21x = 6 + 8 \\ 21x = 14 \\ x = \frac{2}{3}

    3)

    26 - 4x = 3x - 7(x - 3) \\ 26 - 4x = 3x - 7x + 21 \\ 26 - 4x = - 4x + 21 \\ - 4x + 4x = 26 - 21 \\ x = 0

    4)

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