Срочно!!!15 баллов.математика

1.

- 5 1/3 + (-2) = - 5 1/3 - 2 = - 7 1/3,

2.

(-32) + 7 = - 25,
-5/7 + 2/3 = -15/21 + 14/21 = -1/21,

3.

-7 - (-1 2/5) = -7 + 1 2/5 = -6 5/5 + 1 2/5 = - 5 3/5,

4.

х - (-1) - 3 = -4,
х + 1 - 3 = -4,
х = -4 - 1 + 3,
х = -5 + 3,
х = -2

1.
-2 + (-5 1/3) = -7 1/3

2.
а) = 7-32 = -25
б) = 2/3 - 5/7 = (14 - 15) / 21 = - 1/21

3.
= -7 + 1,4 = -5,6

4.
= - 3 + 5 - 6 - 5,5 = - 9,5

5.
х + 1 - 3 = -4
х = -4 -1 +3
х = -2
проверка
-2 +1 -3 = -4