Błagam pomocy ;-; na 18 potrzebuje

Zadanie 7
b)
-6x + 8 = 4
-6x = 4 - 8
-6x = -4 | :(-6)
x = 2/3
c)
5x - 14 = 6
5x = 6 + 14
5x = 20 | : 5
x = 4
d)
9 - x = 24
-x = 24 - 9
-x = 15
x = -15
e)
5 + 4x = 29
4x = 29 - 5
4x = 24 | : 4
x = 6
f)
1/5x - 2 = 4 | * 5
x - 10 = 20
x = 20 + 10
x = 30
Zadanie 8
a)
4x - 6x = 2
-2x = 2 | :(-2)
x = -1
c)
6x + 8 - 7x = 0
-x + 8 = 0
-x = -8
x = 8
e)
y - 3 + y = 5
2y - 3 = 5
2y = 5 + 3
2y = 8 | : 2
y = 4