Kak ada yang tau gak besok dikumpul tolong ya kak

@
7-x = 8
-x = 8 - 7
-x = 1
x = -1

5x + 4 = 6 + 3x
5x - 3x = 6 - 4
2x = 2
x = 2/2
x = 1

2y + 11 = 6 - y
2y - y = 6 - 11
y = -5

7/2 x = 1 - x/6
6(7/2 x) = 6 (1 - x/6)
21 x  = 6 - x
21 x + x = 6
22 x = 6
x = 6/22
x = 3/11

2(a +2) =  6(a-2)
2a + 4 =  6a -12
2a - 6x = -12 - 4
-4 a = -16
a = -16/ -4
a = 4

6(5 - x) = 8 - 4(x +3)
30 - 6x = 8 - 4x -12
30 - 6x = -4x - 4
-6x + 4x = - 4 - 30
- 2x = - 34
x = -34/-2
x = 17

7x -3 = 5x + 9
7x - 5x = 9 + 3
2x = 12
x = 12/2
x = 6