Odpowiedź:
a)
x + 3 = 15/6 + 3x/2 /*2
2x + 6 = 30/6 + 3x
3x - 2x = 6 - 5
x = 1
b)
2x - 3 = 4/2 + 4x
2x - 4x = 2 + 3
-2x = 5 /-2
x = -2,5
c)
x + 2 + 3 x - 3 = 1
4x - 1 = 1
4x = 2 /4
x = 1/2
d)
6x + 9 = 10 - 5 + 15x
-9x = 5 - 9 = - 4 /-9
x = 4/9
e)
15x - 25 - 5x - 1 =0
10x = -26 /10
x = - 26/10
f)
x = 4/5 (4 - x) - 16
x = 16/5 - 4/5x - 16
9/5x = 3,2 - 16 = - 12,8 / 9/5
x = -64/9 = 7 i 1/9
g)
4x - 2 - 5x - 10 = 7x
-8x =12 / -8
x = -8/12 = 2/3
h)
8x - 6x + 10 = -x - 4
x = - 14
