Odpowiedź :
a)
8 - 3*x = 6* x - 10
8 - 3x = 6x - 10
8 + 10 = 6x + 3x
18 = 9x | : 9
x = 2
b)
7* x - 4 = 9 + 8 * x
7x - 4 = 9 + 8x
7x - 8x = 9 - 4
-x = 5
x = - 5
c)
-5 + 7 * x = 2*x- 20
-5 + 7x = 2x - 20
- 5 + 20 = 2x - 7x
10 = - 5x /:5
x= - 2
d)
w załączniku