1. 5x – 4 = 4x 2. 7x = 8x + 12 3. 27 – 3x = 3x + 27 4. 34 – 2x = 7x 5. 5r – 7 = 2r + 1

Question

1.
5x – 4 = 4x
2.
7x = 8x + 12
3.
27 – 3x = 3x + 27
4.
34 – 2x = 7x
5.
5r – 7 = 2r + 14
6.
– X = 7x – 56
7.
5(n – 7) = 2r + 14
8.
6w – 33 = 3(4w – 5)

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Farah 6 months 2021-08-27T22:53:31+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-08-27T22:55:00+00:00

    Step-by-step explanation:

    1. 5x-4 =4x

    5x-4x =4

    x=4

    2. 7x=8x+12

    7x-8x =12

    -x=12

    x= -12

    3. 27-3x=3x+27

    27-27 = 3+3x

    0=6x

    0/6 =x

    x=0/6

    4. 34-2x=7x

    34 =7x+2x

    34 =9x

    34/9=9x/9

    3.78=x

    x=3.78

    5. 5r-7 =2r+14

    5r-2r=14+7

    3r=21

    3r/3 =21/3

    r=7

    6.-x=7x-56

    56=7x+x

    56 =8x

    x=7

    7. 5n -35 =2r +14

    5n-2n =14+35

    3n =49

    n=16.33

    8.6w-33 = 12w-15

    -33+15= 12w-6w

    -18=6w

    -3=w

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )