Odpowiedź:
1. 9 - 3x - 6 = 3x + 15
3 = 6x + 15 / -15
-12 = 6x / :6
-2 = x
Odp. A
2. 2x = 3x - 1
1 = x
A. 0,3x - 0,7 = - 1,7 + 1,3x
1 = x
B. [tex]\frac{1}{3}[/tex] x - 2 - [tex]\frac{1}{3}[/tex] x = x-2
x [tex]\neq[/tex] 0
C. -7x -13 +3x = 2x -5 +2x
8 = 8x / :8
x = 1
D. 0,25x + 0,5[tex]x^{2}[/tex] = [tex]\frac{1}{2}[/tex] [tex]x^{2}[/tex] + [tex]\frac{1}{4}[/tex]
0,25x = 0,25
x = 1
3.
a) 2x - 3 = 5x -2
-1 = 3x / :3
-[tex]\frac{1}{3}[/tex] = x
b) 4 - 3x + 6 = 2x
-2 = 5x / :5
- 0,4 = x
