Zadanie 9:
b)
3x-4 = 5x
3x - 5x = 4
-2x = 4 /:(-2)
x = -2
d)
-2x = 7x + 18
-2x - 7x = 18
-9x = 18 /:(-9)
e)
-4x+ 5 = 25 - 9x
-4x + 9x = 25 - 5
5x = 20 /:5
x = 4
c)
-2x + 7 = 6x-9
-2x - 6x = -9 - 7
-8x = -16 /:(-8)
x = 2
a)
6x + 4 = 2x
6x - 2x = -4
4x = -4 /:4
x = -1
