6 класс уравнение:

1. 6 х - 1 = 3 х + 5 (4 х - 7)

2. 4 (6 х + 5) - 5 (7 х - 4) = х

3. 4 х - 6 (3 х + 8) - 5 (2 х - 7) = 35

4. 7 (2 х - 3) + 1 = 2 (7 х - 10)

1.

6 х-1=3 х+5 (4 х-7)

6 х-1=3 х+20 х-35

6 х-20 х-3 х=-35+1

-17 х=-34

х=2

1. 1. 6 х - 1 = 3 х + 5 (4 х - 7)

6 х-1=3 х+20 х-35

6 х-1-3 х-20 х+35=0

-17 х+34=0

-17 х=-34

х=-34: (-17) = 2

х=2

2. 4 (6 х + 5) - 5 (7 х - 4) = х

24 х+20-35 х+20=х

24 х-35 х-х=0

-12 х=0

х=12

3. 4 х - 6 (3 х + 8) - 5 (2 х - 7) = 35

4 х-18 х-48-10 х+35=35

4 х-18 х-48-10 х+35-35=0

-24 х-48=0

-24 х=48

х=48: (-24) = - 2

х=-2

4. 7 (2 х - 3) + 1 = 2 (7 х - 10)

14 х-21+1=14 х-20

14 х-21+1-14 х+20=0

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