Bardzo proszę o pomoc, dam naj

1) - 3e + 4 + e = 8 + 2e - 1
- 3e + e - 2e = 8 - 1 - 4
- 4e = 3 /: (-4)
e = - 3/4
2) 2 + 6x - 9 = 14 - 4x + 3x
6x + 4x - 3x = 14 - 2 + 9
7x = 21 /: 7
x = 3
3) 2 - 4d + 8d - 6 = - 7d + 4 - 3d
- 4d + 8d + 7d + 3d = 4 - 2 + 6
14d = 8 /:14
d = 8/14
d = 4/7
4) 9u - 3 + u - 2u - 1 = 3u - 9
9u + u - 2u - 3u = - 9 + 3 + 1
5u = - 5 /: 5
u = - 1
5) -2 - 4y + 6y + 9 = 2y - 3 - 4y
- 2 + 9 + 3 = 2y - 4y + 4y - 6y
10 = - 4y /: (-4)
-10/4 = y
- 5/2 = y
- 2 1/2 = y
6) - 6 + 8k - 7 = 4k - k + 13
8k - 4k + k = 13 + 6 + 7
5k = 26 /:5
k = 26/5 = 5 1/5
7) 8 - 3r + 7 = - 4r + 5 - r
8 + 7 - 5 = - 4r - r + 3r
10 = - 2r /: (-2)
- 5 = r