1)6x=28-x 2)9×-26=30-5x 3)7-3x=6x-56 4) 5(x-4)=x+8 5)9-7 (x+3)=5-6×

Question

1)6x=28-x 2)9×-26=30-5x 3)7-3x=6x-56 4) 5(x-4)=x+8 5)9-7 (x+3)=5-6×

Answer 1

Ответ:

Пошаговое объяснение:

1)

6 x = 28 - x

7 x - 28 = 0

x = 4

2)

9×(-26) = 30 - 5 x

-234 = 30 - 5 x

5 x = 264

x = 52.8

3)

7 - 3 x = 6 x - 56

63 - 9 x = 0

x = 7

4)

5 (x - 4) = x + 8

4 x - 28 = 0

x = 7

5)

9 - 7 (x + 3) = 5 - 6

-7 x - 12 = -1

-7 x - 11 = 0

x = 1.57142857143