Verified answer

Пошаговое объяснение:

№5

-х - 7,01 = -15,8

-х = -15,8 + 7,01

-х = -8,79

х = 8,79

|х| + (-6,1) = 3,4

|х| - 6,1 = 3,4

|х| = 3,4 + 6,1

|х| = 9,5

х1 = 9,5

х2 = -9,5

№8

1) -3 3/4 - (-2 1/6) = -3 3/4 + 2 1/6 = -3 9/12 + 2 2/12 = -1 7/12

2) -1 7/12 + (-1 2/3) = -1 7/12 - 1 2/3 = -1 7/12 - 1 8/12 = -2 15/12 = -3 3/12 = -3 1/4

3) -3 1/4 - (-3 1/2) = -3 1/4 + 3 1/2 = -3 1/4 + 3 2/4 = 1/4

4) 1/4 - 5/6 = 3/12 - 10/12 = -7/12